COLMI C28 Smartwatch
COLMI C28 is a slim, lightweight smartwatch designed for connected daily routines. It features a 1.93-inch AMOLED display, Bluetooth 5.3 calling, phone notifications, practical smart tools, and activity and wellness records through the COLMI Fit app.
Its 230 mAh battery supports approximately 4–6 days of typical use, depending on settings and usage. C28 is available in Black, Gold, and Silver.
Explore all COLMI smart watches or contact COLMI for product questions.
1.93 inch AMOLED display with 368 x 448 resolution
About 7 mm slim and 39 g with silicone strap
Bluetooth 5.3 calling, notifications, and daily tools
230 mAh battery with about 4-6 days typical use
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Shipping Information
Use this text to answer questions in as much detail as possible for your customers.
-
Customer Support
Use this text to answer questions in as much detail as possible for your customers.
-
FAQ’s
Use this text to answer questions in as much detail as possible for your customers.
-
Contact Us
Use this text to answer questions in as much detail as possible for your customers.
Slim design, smart everyday features
Core C28 benefits rewritten from the detail page and specification sheet.
Large AMOLED display
A 1.93 inch AMOLED display with 368 x 448 resolution gives C28 a clear interface for calls, notifications, and daily tools.
Slim and light
At about 7 mm slim and 39 g with silicone strap, C28 is designed for lighter daily wear.
Calling and smart tools
Bluetooth 5.3 calling, notifications, watch faces, assistant access, and practical tools keep phone-connected actions close.
AMOLED clarity for calls, tools, and watch faces
The 1.93 inch AMOLED display and 368 x 448 resolution make C28 easy to read for notifications, calls, workouts, and daily glanceable information.
A slimmer watch body for everyday comfort
C28 is listed at about 46 x 40 x 7 mm and 39 g with silicone strap, giving it a lighter wrist feel for daily wear, work, and workouts.
Wellness trends in COLMI Fit
Consumer wellness records for everyday self-reference, not medical diagnosis.
Sleep trends
Wear C28 overnight to record sleep timing and sleep-stage trends for personal reference.
Stress records
Review stress records and use relaxation tools as general wellness support.
Heart rate and SpO2 records
Track heart rate and SpO2 reference data in supported situations and review recent trends in the app.
Useful features without unlocking your phone
Notifications at a glance
When connected to your phone, C28 can show supported calls, messages, and app notifications on your wrist.
Watch face library
Personalize the display with watch faces available through the COLMI Fit app.
Assistant access and tools
Use assistant access, music control, camera remote, timer, alarm, world clock, calculator, and more practical tools.
Battery life for daily routines
The 230 mAh lithium polymer battery supports about 4-6 days of typical use, with about 2 hours charging through the 2-pin magnetic cable. Actual battery life varies by setup and use.
Available C28 colors
Specification sheet lists Black, Gold, and Silver watch colors.
Black
A clean black finish for daily sport and work routines.
Gold
A warmer case and strap look for a softer smartwatch style.
Silver
A lighter silver-grey finish for a simple everyday smartwatch look.
C28 specifications
Verified product details from the C28 specification sheet, rewritten for a cleaner customer-facing product page.
Base parameters
Brand: COLMI
Product name: C28 Smartwatch
Colors: Black, Gold, Silver
Watchband: Silicone strap
Watchband colors: Black, Gold, Grey
Watch material: Metal + IML
Button: Alloy button x 1
Display and chipset
Main chipset: JL7074
Memory: RAM 316K, ROM 128M
Heart rate sensor: VC30F
Display type: AMOLED
Screen size: 1.93 inch
Resolution: 368 x 448 pixels
Touch type: Full-screen touch
Cover: Glass
Size and wearing
Appearance size: 46 x 40 x 7 mm
Watch weight: 39 g with silicone strap
Watchband width: 20 mm
Assembly mode: Removable
Battery and charging
Battery type: Lithium polymer battery
Capacity: 230 mAh
Protection IC: Seiko Y1
Charging method: 2-pin magnetic cable
Charging time: About 2 hours
Typical use time: About 4-6 days
Standby time: About 20 days
Battery cycles: Above 300
Connectivity and app
Bluetooth: BT5.3
Bluetooth distance: Above 10 m
Speaker: Supported
Microphone: Supported
App: COLMI Fit
Phone system: Android 5.0 and above, iOS 9.0 and above, HarmonyOS
Watch features
Activity, exercise modes, exercise records, relaxation, sleep records, heart rate records, blood pressure reference, SpO2 reference, stress records, cycle tracking, phone calls, messages, assistant access, AI watch face, weather, shutter, music player, timer, alarm, stopwatch, world clock, calculator, find phone, brightness, watch face, menu view, sleep mode, wrist raise, cover lock, vibration and ring, DND mode, low power mode, and more.
Water resistance
Water resistance: 1ATM. Suitable for common daily water exposure. Do not use for diving, sauna, hot water, or high-pressure water sports.
Package contents
Accessory: Watch, manual, magnetic cable
Package size: 100 x 93 x 67 mm
Package weight: 180 g
App download
Download COLMI Fit from Google Play or the App Store.
Wellness data notice
This product is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease. Health and wellness data is for personal reference only. Battery life and feature availability may vary by setup, operation, app version, and environment.
Questions before you order
Quick answers about colors, app compatibility, battery life, water resistance, and wellness data.
Which colors are available?
The C28 specification sheet lists Black, Gold, and Silver watch colors. The product currently needs proper Shopify color variants before launch.
Which app does C28 use?
C28 works with the COLMI Fit app for connection, records, watch faces, and daily settings.
How long does the battery last?
The specification sheet lists about 4-6 days of typical use, about 20 days standby time, and about 2 hours charging time. Actual battery life depends on settings, screen brightness, call use, notifications, and environment.
Is C28 water resistant?
C28 is listed as 1ATM water resistant for common daily water exposure. It should not be used for diving, sauna, hot water, or high-pressure water sports.
Are the wellness records medical data?
No. C28 is a consumer smartwatch. Wellness records are for personal reference only and are not intended for diagnosis, treatment, cure, or disease prevention.