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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.
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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.
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COLMI R02 Interchangeable Shell
Does it have an interchangeable shell?
Yes 0Votes COLMI R02
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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.
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COLMI R02 Finish Type
What type of finish does it have?
0 COLMI R02 0 Votes Polished
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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.
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COLMI R02 Ring Width
What is the ring width?
0.31 inch 0Votes
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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.
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COLMI R02 Ring Thickness
How thick is the ring?
0.11 inch 0Votes
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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.
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COLMI R02 Hypoallergenic
Is it hypoallergenic?
Yes 0Votes COLMI R02
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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.
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COLMI R02 Waterproof
Is it waterproof?
Yes 0Votes COLMI R02
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COLMI R02
The ring is waterproof, ensuring protection against water damage during daily activities and occasional submersion.
Indicates whether the ring is fully waterproof.
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COLMI R02 Water Resistance Depth
What is the water resistance depth?
164 ft 0Votes
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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.
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COLMI R02 Dust Resistant
Is it dust resistant?
Yes 0Votes COLMI R02
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COLMI R02
The ring has dust resistant properties, protecting its internal components from contamination by small particles.
Indicates protection against dust ingress.
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COLMI R02 Ring Material
What material is the ring made from?
0 COLMI R02 0 Votes Stainless Steel
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Defines the primary structural material of the ring.
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COLMI R02 Coating Type
What coating type does it use?
0 COLMI R02 0 Votes None
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Indicates protective or aesthetic surface coating.
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COLMI R02 Color Options
What color options are available?
0 COLMI R02 0 Votes Rose gold, Black, Silver
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Lists available color variants.
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COLMI R02 Ring Shape
What is the ring shape?
0 COLMI R02 0 Votes Round
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Describes the exterior shape profile.
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COLMI R02 Weight
How much does it weigh?
0.15 oz 0Votes
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Total weight of the smart ring.
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COLMI R02 Scratch Resistant
Is it scratch resistant?
Yes 0Votes COLMI R02
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Specifies resistance to surface scratches.
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Size & Fit 10
COLMI R02 Fit Guidance
Is fit guidance provided?
Yes 0Votes COLMI R02
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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.
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COLMI R02 Unisex Design
Is it a unisex design?
Yes 0Votes COLMI R02
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The design is unisex, meaning it is aesthetically and functionally appropriate for users of any gender.
Indicates suitability for all genders.
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COLMI R02 Daily Wear Suitable
Is it suitable for daily wear?
Yes 0Votes COLMI R02
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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.
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COLMI R02 Comfort Fit Interior
Does it have a comfort-fit interior?
Yes 0Votes COLMI R02
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The interior of the ring is designed for comfort, reducing irritation and allowing for longer continuous wear.
Indicates ergonomic interior shaping for comfort.
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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
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Lists the selectable ring sizes offered.
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COLMI R02 Size System
What sizing system does it use?
0 COLMI R02 0 Votes US
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Indicates the sizing standard used.
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COLMI R02 Adjustable Fit
Is the fit adjustable?
No 0Votes COLMI R02
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Specifies whether the ring size can be adjusted.
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COLMI R02 Sizing Kit
Is a sizing kit included?
No 0Votes COLMI R02
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Indicates whether a physical sizing kit is included or provided.
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COLMI R02 Custom Fit Option
Is custom fit available?
No 0Votes COLMI R02
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Specifies if custom sizing is available.
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COLMI R02 Sleep Wear Suitable
Is it suitable for sleep wear?
Yes 0Votes COLMI R02
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Indicates comfort for overnight use.
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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.
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Enables SpO2 tracking functionality.
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COLMI R02 Sleep Tracking
Does it track sleep?
Yes 0Votes COLMI R02
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COLMI R02
Sleep tracking is enabled, allowing automatic monitoring of sleep duration and quality through sensors.
Tracks total sleep duration.
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COLMI R02 Resting Heart Rate
Does it track resting heart rate?
Yes 0Votes COLMI R02
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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.
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COLMI R02 Step Tracking
Does it track steps?
Yes 0Votes COLMI R02
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COLMI R02
Step tracking is enabled, which supports fitness monitoring by counting users' steps throughout the day.
Counts daily step totals.
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COLMI R02 Sleep Stages Tracking
Does it track sleep stages?
Yes 0Votes COLMI R02
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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.
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COLMI R02 Sleep Score
Does it provide a sleep score?
Yes 0Votes COLMI R02
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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.
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COLMI R02 Heart Rate Variability
Does it measure heart rate variability?
No 0Votes COLMI R02
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Measures HRV for recovery and stress insights.
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COLMI R02 Skin Temperature Monitoring
Does it monitor skin temperature?
No 0Votes COLMI R02
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Tracks variations in skin temperature.
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COLMI R02 Calorie Tracking
Does it track calories?
Yes 0Votes COLMI R02
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Calculates estimated calories burned.
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COLMI R02 Distance Tracking
Does it track distance?
Yes 0Votes COLMI R02
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Estimates distance traveled.
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COLMI R02 Automatic Workout Detection
Does it automatically detect workouts?
No 0Votes COLMI R02
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Automatically detects exercise sessions.
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COLMI R02 Stress Monitoring
Does it monitor stress?
No 0Votes COLMI R02
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Measures stress levels using biometric signals.
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COLMI R02 Recovery Tracking
Does it track recovery?
No 0Votes COLMI R02
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Provides recovery or readiness insights.
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COLMI R02 Women Health Tracking
Does it support women's health tracking?
No 0Votes COLMI R02
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Supports menstrual cycle or hormonal tracking.
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COLMI R02 Meditation Support
Does it support meditation tracking?
No 0Votes COLMI R02
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Offers guided or tracked meditation features.
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COLMI R02 Hydration Tracking
Does it support hydration tracking?
No 0Votes COLMI R02
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Tracks or estimates hydration levels.
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COLMI R02 Respiratory Rate Tracking
Does it track respiratory rate?
No 0Votes COLMI R02
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Tracks breathing rate metrics.
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COLMI R02 Readiness Score
Does it provide a readiness score?
No 0Votes COLMI R02
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Provides daily readiness or performance score.
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Smart Features 15
COLMI R02 Data Sync Method
How does it sync data?
0 COLMI R02 0 Votes Manual Sync
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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.
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COLMI R02 Remote Camera Control
Does it support remote camera control?
Yes 0Votes COLMI R02
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Allows remote smartphone camera triggering.
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COLMI R02 Call Notifications
Does it support call notifications?
No 0Votes COLMI R02
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Supports incoming call alerts.
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COLMI R02 Message Notifications
Does it support message notifications?
No 0Votes COLMI R02
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Supports SMS or messaging alerts.
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COLMI R02 App Notifications
Does it support app notifications?
No 0Votes COLMI R02
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Supports third-party app alerts.
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COLMI R02 Alarm Function
Does it have an alarm function?
No 0Votes COLMI R02
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Includes vibration-based alarm capability.
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COLMI R02 Vibration Alerts
Does it provide vibration alerts?
No 0Votes COLMI R02
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Provides haptic feedback alerts.
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COLMI R02 Gesture Control
Does it support gesture control?
No 0Votes COLMI R02
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Supports motion-based command inputs.
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COLMI R02 Voice Assistant
Does it support voice assistants?
No 0Votes COLMI R02
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Integrates with digital voice assistants.
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COLMI R02 Contactless Payment
Does it support contactless payments?
No 0Votes COLMI R02
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Enables NFC-based payments.
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COLMI R02 Find My Device
Does it support device finding?
No 0Votes COLMI R02
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Supports device locating features.
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COLMI R02 Offline Data Storage
Does it support offline data storage?
Yes 0Votes COLMI R02
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Stores data locally without immediate sync.
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COLMI R02 OTA Updates
Does it support OTA updates?
Yes 0Votes COLMI R02
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Supports over-the-air firmware updates.
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COLMI R02 Multi Device Pairing
Can it pair with multiple devices?
No 0Votes COLMI R02
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Allows pairing with multiple devices.
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COLMI R02 Airplane Mode
Does it include airplane mode?
No 0Votes COLMI R02
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Disables wireless communication when enabled.
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Indicates CE certification for EU markets.
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COLMI R02 RoHS Compliant
Is it RoHS compliant?
Yes 0Votes COLMI R02
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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.
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COLMI R02 FCC Certified
Is it FCC certified?
Yes 0Votes COLMI R02
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COLMI R02
The device has FCC certification which confirms compliance with regulatory standards in the United States.
Indicates FCC certification for wireless transmission.
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COLMI R02 Radiation Level
What is the radiation level?
0 COLMI R02 0 Votes Ultra Low
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COLMI R02
Radiation levels emitted by the device are ultra low, ensuring user safety during prolonged wear.
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