Yep, we may get a tiny thank-you (read: commission) when you buy through
links on Healthspotr — not enough for a yacht, but enough to keep the lights (and
servers) on.
Learn more
A real review to help you decide which smart ring offers the best value and features compared.
Every detail counts. The COLMI R02 has 145 specs to explore — from must-have certification rating, charging method, bluetooth version & heart rate sensor to nice-to-haves.
A fast snapshot of the COLMI R02, covering its standout specification and what you can expect right out of the box.
COLMI R02
The COLMI R02 Smart Ring delivers essential fitness and health tracking features in a compact and affordable design. It monitors heart rate, sleep quality, and daily activity while supporting multiple sports modes. With a lightweight build and efficient battery life, it is ideal for everyday use.
Quick Specs Breakdown
The key specs that actually matter—no fluff, no guesswork
Here’s a streamlined view of the COLMI R02 key specifications. Compare critical features at a glance before exploring the full specs and hands-on insights below.
Design & Build
Certification Rating
What certification rating does it have?
IP68, 5ATM
Battery & Charging
Charging Method
How does it charge?
Magnetic Dock
Battery Life
How long does the battery last?
5–6 Days
Connectivity & Performance
Bluetooth Version
What Bluetooth version does it use?
5.0
Hardware & Sensors
Heart Rate Sensor
Does it have a heart rate sensor?
Yes
Blood Oxygen Sensor
Does it have a blood oxygen sensor?
Yes
Sleep Tracking Sensor
Does it include sleep tracking hardware?
Yes
Health & Fitness Tracking
Workout Tracking
Does it support workout tracking?
Yes
Heart Rate Monitoring
Does it support heart rate monitoring?
Yes
Blood Oxygen Monitoring
Does it support blood oxygen monitoring?
Yes
General Information
Operating System Support
Which operating systems are supported?
iOS, Android
Generation
What generation is the device?
2
Water Usage Rating
What is the water usage rating?
5ATM
Wearable Category
What wearable category does it belong to?
Health Tracking,Fitness Tracking
Safety & Compliance
CE Certified
Is it CE certified?
Yes
Specifications & Facts
145
Specs measured. Drama avoided.
Get more than a spec sheet. We broke down the COLMI R02 into what users actually care about — feel, function, and what’s worth it.
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The device boasts an IP68 rating and 5ATM water resistance, meaning it is dust-tight and can safely withstand water pressures equivalent to immersion up to 50 meters underwater, making it suitable for swimming and water-related activities.
Official ingress or water resistance certification.
Don’t keep it to yourself — be the first to react and review the
Certification Rating on COLMI R02
◉ and help others decide!
COLMI R02
Interchangeable Shell
Does it have an interchangeable shell?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The ring features an interchangeable shell to allow users aesthetic customization or easy replacement of the outer casing.
Indicates if outer shell or cover can be replaced.
Don’t keep it to yourself — be the first to react and review the
Interchangeable Shell on COLMI R02
◉ and help others decide!
COLMI R02
Finish Type
What type of finish does it have?
0
COLMI R02
0
Votes
Polished
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The finish type is polished, giving the ring a shiny, smooth surface that enhances its aesthetic appeal.
Describes the surface texture and visual finish.
Don’t keep it to yourself — be the first to react and review the
Finish Type on COLMI R02
◉ and help others decide!
COLMI R02
Ring Width
What is the ring width?
0.31
inch
0Votes
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The ring width measures 0.31 inch, equivalent to 0.79 cm, contributing to its sleek and comfortable profile.
Measures the band width across the finger.
Don’t keep it to yourself — be the first to react and review the
Ring Width on COLMI R02
◉ and help others decide!
COLMI R02
Ring Thickness
How thick is the ring?
0.11
inch
0Votes
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The ring thickness is 0.11 inch, approximately 0.28 cm, contributing to its slim profile for user comfort.
Indicates the vertical thickness of the ring.
Don’t keep it to yourself — be the first to react and review the
Ring Thickness on COLMI R02
◉ and help others decide!
COLMI R02
Hypoallergenic
Is it hypoallergenic?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The ring is hypoallergenic, making it suitable for users with sensitive skin or allergies to certain metals or materials.
Indicates skin-friendly materials suitable for sensitive users.
Don’t keep it to yourself — be the first to react and review the
Hypoallergenic on COLMI R02
◉ and help others decide!
COLMI R02
Waterproof
Is it waterproof?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The ring is waterproof, ensuring protection against water damage during daily activities and occasional submersion.
Indicates whether the ring is fully waterproof.
Don’t keep it to yourself — be the first to react and review the
Waterproof on COLMI R02
◉ and help others decide!
COLMI R02
Water Resistance Depth
What is the water resistance depth?
164
ft
0Votes
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
Water resistance depth is 164 feet, which equals 50 meters, confirming the device is safe for submersion during swimming.
Maximum supported water depth rating.
Don’t keep it to yourself — be the first to react and review the
Water Resistance Depth on COLMI R02
◉ and help others decide!
COLMI R02
Dust Resistant
Is it dust resistant?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The ring has dust resistant properties, protecting its internal components from contamination by small particles.
Indicates protection against dust ingress.
Don’t keep it to yourself — be the first to react and review the
Dust Resistant on COLMI R02
◉ and help others decide!
COLMI R02
Ring Material
What material is the ring made from?
0
COLMI R02
0
Votes
Stainless Steel
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Defines the primary structural material of the ring.
Don’t keep it to yourself — be the first to react and review the
Ring Material on COLMI R02
◉ and help others decide!
COLMI R02
Coating Type
What coating type does it use?
0
COLMI R02
0
Votes
None
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Indicates protective or aesthetic surface coating.
Don’t keep it to yourself — be the first to react and review the
Coating Type on COLMI R02
◉ and help others decide!
COLMI R02
Color Options
What color options are available?
0
COLMI R02
0
Votes
Rose gold, Black, Silver
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Lists available color variants.
Don’t keep it to yourself — be the first to react and review the
Color Options on COLMI R02
◉ and help others decide!
COLMI R02
Ring Shape
What is the ring shape?
0
COLMI R02
0
Votes
Round
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Describes the exterior shape profile.
Don’t keep it to yourself — be the first to react and review the
Ring Shape on COLMI R02
◉ and help others decide!
COLMI R02
Weight
How much does it weigh?
0.15
oz
0Votes
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Total weight of the smart ring.
Don’t keep it to yourself — be the first to react and review the
Weight on COLMI R02
◉ and help others decide!
COLMI R02
Scratch Resistant
Is it scratch resistant?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Specifies resistance to surface scratches.
Don’t keep it to yourself — be the first to react and review the
Scratch Resistant on COLMI R02
◉ and help others decide!
Size & Fit
10
COLMI R02
Fit Guidance
Is fit guidance provided?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
Fit guidance is available to assist users in selecting the correct ring size or adjusting for comfort during wear.
Indicates if sizing instructions are provided.
Don’t keep it to yourself — be the first to react and review the
Fit Guidance on COLMI R02
◉ and help others decide!
COLMI R02
Unisex Design
Is it a unisex design?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The design is unisex, meaning it is aesthetically and functionally appropriate for users of any gender.
Indicates suitability for all genders.
Don’t keep it to yourself — be the first to react and review the
Unisex Design on COLMI R02
◉ and help others decide!
COLMI R02
Daily Wear Suitable
Is it suitable for daily wear?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The ring is suitable for daily wear; this implies it is comfortable and durable enough to be worn throughout the day without causing irritation.
Indicates suitability for continuous daily use.
Don’t keep it to yourself — be the first to react and review the
Daily Wear Suitable on COLMI R02
◉ and help others decide!
COLMI R02
Comfort Fit Interior
Does it have a comfort-fit interior?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The interior of the ring is designed for comfort, reducing irritation and allowing for longer continuous wear.
Indicates ergonomic interior shaping for comfort.
Don’t keep it to yourself — be the first to react and review the
Comfort Fit Interior on COLMI R02
◉ and help others decide!
COLMI R02
Available Sizes
What sizes are available?
0
COLMI R02
0
Votes
US 7, US 8, US 9, US 10, US 11, US 12
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Lists the selectable ring sizes offered.
Don’t keep it to yourself — be the first to react and review the
Available Sizes on COLMI R02
◉ and help others decide!
COLMI R02
Size System
What sizing system does it use?
0
COLMI R02
0
Votes
US
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Indicates the sizing standard used.
Don’t keep it to yourself — be the first to react and review the
Size System on COLMI R02
◉ and help others decide!
COLMI R02
Adjustable Fit
Is the fit adjustable?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Specifies whether the ring size can be adjusted.
Don’t keep it to yourself — be the first to react and review the
Adjustable Fit on COLMI R02
◉ and help others decide!
COLMI R02
Sizing Kit
Is a sizing kit included?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Indicates whether a physical sizing kit is included or provided.
Don’t keep it to yourself — be the first to react and review the
Sizing Kit on COLMI R02
◉ and help others decide!
COLMI R02
Custom Fit Option
Is custom fit available?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Specifies if custom sizing is available.
Don’t keep it to yourself — be the first to react and review the
Custom Fit Option on COLMI R02
◉ and help others decide!
COLMI R02
Sleep Wear Suitable
Is it suitable for sleep wear?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Indicates comfort for overnight use.
Don’t keep it to yourself — be the first to react and review the
Sleep Wear Suitable on COLMI R02
◉ and help others decide!
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
Workout tracking is supported, enabling the device to monitor and record physical exercise activities automatically or manually according to user preference.
Supports manual workout mode logging.
Don’t keep it to yourself — be the first to react and review the
Workout Tracking on COLMI R02
◉ and help others decide!
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Enables SpO2 tracking functionality.
Don’t keep it to yourself — be the first to react and review the
Blood Oxygen Monitoring on COLMI R02
◉ and help others decide!
COLMI R02
Sleep Tracking
Does it track sleep?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
Sleep tracking is enabled, allowing automatic monitoring of sleep duration and quality through sensors.
Tracks total sleep duration.
Don’t keep it to yourself — be the first to react and review the
Sleep Tracking on COLMI R02
◉ and help others decide!
COLMI R02
Resting Heart Rate
Does it track resting heart rate?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
Resting heart rate monitoring allows for tracking heart rate when the user is inactive, useful for assessing cardiovascular fitness.
Tracks resting heart rate trends.
Don’t keep it to yourself — be the first to react and review the
Resting Heart Rate on COLMI R02
◉ and help others decide!
COLMI R02
Step Tracking
Does it track steps?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
Step tracking is enabled, which supports fitness monitoring by counting users' steps throughout the day.
Counts daily step totals.
Don’t keep it to yourself — be the first to react and review the
Step Tracking on COLMI R02
◉ and help others decide!
COLMI R02
Sleep Stages Tracking
Does it track sleep stages?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
Sleep stages tracking is available, offering granularity in sleep analysis including light, deep, and REM phases.
Tracks light, deep, and REM sleep stages.
Don’t keep it to yourself — be the first to react and review the
Sleep Stages Tracking on COLMI R02
◉ and help others decide!
COLMI R02
Sleep Score
Does it provide a sleep score?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
Sleep score functionality is included, allowing the device to provide users with a quantitative measure of their sleep quality and patterns.
Provides an overall sleep quality score.
Don’t keep it to yourself — be the first to react and review the
Sleep Score on COLMI R02
◉ and help others decide!
COLMI R02
Heart Rate Variability
Does it measure heart rate variability?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Measures HRV for recovery and stress insights.
Don’t keep it to yourself — be the first to react and review the
Heart Rate Variability on COLMI R02
◉ and help others decide!
COLMI R02
Skin Temperature Monitoring
Does it monitor skin temperature?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Tracks variations in skin temperature.
Don’t keep it to yourself — be the first to react and review the
Skin Temperature Monitoring on COLMI R02
◉ and help others decide!
COLMI R02
Calorie Tracking
Does it track calories?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Calculates estimated calories burned.
Don’t keep it to yourself — be the first to react and review the
Calorie Tracking on COLMI R02
◉ and help others decide!
COLMI R02
Distance Tracking
Does it track distance?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Estimates distance traveled.
Don’t keep it to yourself — be the first to react and review the
Distance Tracking on COLMI R02
◉ and help others decide!
COLMI R02
Automatic Workout Detection
Does it automatically detect workouts?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Automatically detects exercise sessions.
Don’t keep it to yourself — be the first to react and review the
Automatic Workout Detection on COLMI R02
◉ and help others decide!
COLMI R02
Stress Monitoring
Does it monitor stress?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Measures stress levels using biometric signals.
Don’t keep it to yourself — be the first to react and review the
Stress Monitoring on COLMI R02
◉ and help others decide!
COLMI R02
Recovery Tracking
Does it track recovery?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Provides recovery or readiness insights.
Don’t keep it to yourself — be the first to react and review the
Recovery Tracking on COLMI R02
◉ and help others decide!
COLMI R02
Women Health Tracking
Does it support women's health tracking?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Supports menstrual cycle or hormonal tracking.
Don’t keep it to yourself — be the first to react and review the
Women Health Tracking on COLMI R02
◉ and help others decide!
COLMI R02
Meditation Support
Does it support meditation tracking?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Offers guided or tracked meditation features.
Don’t keep it to yourself — be the first to react and review the
Meditation Support on COLMI R02
◉ and help others decide!
COLMI R02
Hydration Tracking
Does it support hydration tracking?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Tracks or estimates hydration levels.
Don’t keep it to yourself — be the first to react and review the
Hydration Tracking on COLMI R02
◉ and help others decide!
COLMI R02
Respiratory Rate Tracking
Does it track respiratory rate?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Tracks breathing rate metrics.
Don’t keep it to yourself — be the first to react and review the
Respiratory Rate Tracking on COLMI R02
◉ and help others decide!
COLMI R02
Readiness Score
Does it provide a readiness score?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Provides daily readiness or performance score.
Don’t keep it to yourself — be the first to react and review the
Readiness Score on COLMI R02
◉ and help others decide!
Smart Features
15
COLMI R02
Data Sync Method
How does it sync data?
0
COLMI R02
0
Votes
Manual Sync
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
Data synchronization occurs through manual sync, meaning the user must initiate data transfer to refresh information between the ring and its companion device or app.
Defines how data synchronization occurs.
Don’t keep it to yourself — be the first to react and review the
Data Sync Method on COLMI R02
◉ and help others decide!
COLMI R02
Remote Camera Control
Does it support remote camera control?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Allows remote smartphone camera triggering.
Don’t keep it to yourself — be the first to react and review the
Remote Camera Control on COLMI R02
◉ and help others decide!
COLMI R02
Call Notifications
Does it support call notifications?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Supports incoming call alerts.
Don’t keep it to yourself — be the first to react and review the
Call Notifications on COLMI R02
◉ and help others decide!
COLMI R02
Message Notifications
Does it support message notifications?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Supports SMS or messaging alerts.
Don’t keep it to yourself — be the first to react and review the
Message Notifications on COLMI R02
◉ and help others decide!
COLMI R02
App Notifications
Does it support app notifications?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Supports third-party app alerts.
Don’t keep it to yourself — be the first to react and review the
App Notifications on COLMI R02
◉ and help others decide!
COLMI R02
Alarm Function
Does it have an alarm function?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Includes vibration-based alarm capability.
Don’t keep it to yourself — be the first to react and review the
Alarm Function on COLMI R02
◉ and help others decide!
COLMI R02
Vibration Alerts
Does it provide vibration alerts?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Provides haptic feedback alerts.
Don’t keep it to yourself — be the first to react and review the
Vibration Alerts on COLMI R02
◉ and help others decide!
COLMI R02
Gesture Control
Does it support gesture control?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Supports motion-based command inputs.
Don’t keep it to yourself — be the first to react and review the
Gesture Control on COLMI R02
◉ and help others decide!
COLMI R02
Voice Assistant
Does it support voice assistants?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Integrates with digital voice assistants.
Don’t keep it to yourself — be the first to react and review the
Voice Assistant on COLMI R02
◉ and help others decide!
COLMI R02
Contactless Payment
Does it support contactless payments?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Enables NFC-based payments.
Don’t keep it to yourself — be the first to react and review the
Contactless Payment on COLMI R02
◉ and help others decide!
COLMI R02
Find My Device
Does it support device finding?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Supports device locating features.
Don’t keep it to yourself — be the first to react and review the
Find My Device on COLMI R02
◉ and help others decide!
COLMI R02
Offline Data Storage
Does it support offline data storage?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Stores data locally without immediate sync.
Don’t keep it to yourself — be the first to react and review the
Offline Data Storage on COLMI R02
◉ and help others decide!
COLMI R02
OTA Updates
Does it support OTA updates?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Supports over-the-air firmware updates.
Don’t keep it to yourself — be the first to react and review the
OTA Updates on COLMI R02
◉ and help others decide!
COLMI R02
Multi Device Pairing
Can it pair with multiple devices?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Allows pairing with multiple devices.
Don’t keep it to yourself — be the first to react and review the
Multi Device Pairing on COLMI R02
◉ and help others decide!
COLMI R02
Airplane Mode
Does it include airplane mode?
No
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Disables wireless communication when enabled.
Don’t keep it to yourself — be the first to react and review the
Airplane Mode on COLMI R02
◉ and help others decide!
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
Indicates CE certification for EU markets.
Don’t keep it to yourself — be the first to react and review the
CE Certified on COLMI R02
◉ and help others decide!
COLMI R02
RoHS Compliant
Is it RoHS compliant?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The product is RoHS compliant, which means it adheres to the Restriction of Hazardous Substances directive, ensuring it limits the use of certain harmful materials for environmentally safer manufacturing.
Indicates compliance with hazardous substance regulations.
Don’t keep it to yourself — be the first to react and review the
RoHS Compliant on COLMI R02
◉ and help others decide!
COLMI R02
FCC Certified
Is it FCC certified?
Yes
0Votes
COLMI R02
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
The device has FCC certification which confirms compliance with regulatory standards in the United States.
Indicates FCC certification for wireless transmission.
Don’t keep it to yourself — be the first to react and review the
FCC Certified on COLMI R02
◉ and help others decide!
COLMI R02
Radiation Level
What is the radiation level?
0
COLMI R02
0
Votes
Ultra Low
Smart Ring in this range
Who knows?
(Help us out by suggesting one!)
COLMI R02
Radiation levels emitted by the device are ultra low, ensuring user safety during prolonged wear.