Colmi C28 AMOLED Display Ultra Slim Bluetooth Calling Smartwatch: 1.93″ AMOLED | 368×448 Resolution | 90% Screen Ratio | Bluetooth 5.3 | 100+ Sports Modes | Health Monitoring | AI Watch Faces
Ultra‑Slim Body (7mm) | Ultra‑Light (39g) | 230mAh Battery | 1ATM Waterproof | Bluetooth Calls | COLMI Fit App | Classic & Stylish Dual Strap
Key Features
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1.93″ AMOLED Ultra HD Large Display – 90% Screen Ratio: Stunning 1.93‑inch AMOLED display with 368×448 resolution. 90% screen‑to‑body ratio for an immersive viewing experience. Bright, bold, and beautiful.
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Ultra‑Slim & Ultra‑Light – 7mm Thickness, 39g Weight: Sleek & slim design for effortless comfort. Thickness equivalent to 4 stacked coins. Smaller size, more light & thin – wear it all day without fatigue.
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Bluetooth Calls on Wrist – Stay Connected: Make and answer Bluetooth calls directly from your watch. Built‑in speaker and microphone for convenient hands‑free communication.
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AI Watch Faces – Create Your Own Style: AI‑generated watch faces – tell the watch the background you want. For example: “I want a picture with puppies and kittens.” The watch creates a custom watch face for you.
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24/7 Health Monitoring – Complete Wellness Tracking: Comprehensive health monitoring features:
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Heart Rate Monitoring
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Blood Oxygen Monitoring (SpO2)
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Stress Monitoring
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Sleep Monitoring
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Smart Sedentary Reminder
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100+ Sports Modes – Enjoy Sports Anytime: Track a wide variety of indoor and outdoor activities. Monitor your performance, steps, calories, and more.
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Message Push – Check with a Wrist Flick: Receive notifications for texts and social apps. Raise your wrist to see messages at a glance.
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DA GPT – AI Brain on Wrist: AI assistant feature – confirm your question and get answers. “What’s the weather like today?” – instant response on your wrist.
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Bluetooth 5.3 – Fast, Stable Connection: Built‑in JL7074 CPU with RAM 316K and ROM 128M. Stable wireless connection for calls, notifications, and data sync.
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Classic & Stylish Dual Strap: Two strap options included – switch between styles to match your outfit or activity. (Strap materials and colors not specified in images.)
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Long Battery Life – 230mAh Battery: Reliable battery capacity for daily use. Specific battery life not specified in images.
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1ATM Waterproof Level: Splash and rain resistant – suitable for daily wear and hand washing. (Not for swimming or submersion.)
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COLMI Fit App – Your First Smartwatch: Compatible with Android 5.0 and above, or iOS 10.0 and above. Download the COLMI Fit app for detailed health and fitness insights.
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CE, ROHS, FCC Certified: Meets international safety and quality standards.
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100% Full Inspection: Every unit undergoes rigorous quality testing before shipping.
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Official Warranty: Comprehensive warranty coverage for peace of mind.
Product Details
1.93″ AMOLED Ultra HD Large Display – 90% Screen Ratio
The Colmi C28 features a stunning AMOLED display:
| Display Specification | Details |
|---|---|
| Screen Type | AMOLED |
| Size | 1.93 inches |
| Resolution | 368 × 448 pixels |
| Screen Ratio | 90% |
Vibrant colors, deep blacks, and excellent outdoor visibility.
Ultra‑Slim & Ultra‑Light – 7mm Thickness, 39g Weight
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Thickness: 7mm – equivalent to 4 stacked coins
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Weight: 39g – lighter than most smartwatches
Sleek & slim design for effortless comfort. Wear it all day without fatigue.
Bluetooth Calls on Wrist – Stay Connected
Make and answer Bluetooth calls directly from your watch. Features:
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Built‑in speaker and microphone
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Hands‑free communication
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Caller ID display on wrist
Perfect for when your phone is in your bag or across the room.
AI Watch Faces – Create Your Own Style
Unlike other smartwatches, the Colmi C28 features AI‑generated watch faces:
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Tell the watch what background you want
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Example: “I want a picture with puppies and kittens”
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The watch creates a custom watch face for you
Express yourself with unlimited unique designs.
24/7 Health Monitoring – Complete Wellness Tracking
The Colmi C28 provides real‑time health monitoring:
| Health Feature | Function |
|---|---|
| Heart Rate Monitoring | 24/7 continuous heart rate tracking |
| Blood Oxygen Monitoring | SpO2 measurement for wellness insights |
| Stress Monitoring | Track stress levels throughout the day |
| Sleep Monitoring | Analyze sleep quality and patterns |
| Smart Sedentary Reminder | Reminders to move when inactive |
100+ Sports Modes – Enjoy Sports Anytime
Track a wide variety of indoor and outdoor activities:
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Running, walking, cycling
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Outdoor workouts
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Indoor sports
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And more – over 100 modes
Monitor steps, calories, distance, and heart rate during activity.
Message Push – Check with a Wrist Flick
Receive notifications for:
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Text messages
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Social media updates (LINE, TALK, and more)
Raise your wrist to see messages at a glance – no need to pull out your phone.
DA GPT – AI Brain on Wrist
AI assistant feature that lets you:
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Ask questions directly from your watch
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Get instant answers
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Example: “What’s the weather like today?”
Your AI brain on your wrist – call anytime, connect instantly.
Bluetooth 5.3 – Fast, Stable Connection
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CPU: JL7074
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Flash: RAM 316K, ROM 128M
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Bluetooth Version: 5.3
Reliable wireless connection for calls, notifications, and data sync with your phone.
COLMI Fit App – Your First Smartwatch
Download the COLMI Fit app for comprehensive health and fitness insights:
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Compatible with: Android 5.0 and above, iOS 10.0 and above
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Features: Sync health data, customize watch faces, track fitness progress
COLMI – Your first smartwatch.
1ATM Waterproof Level
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Waterproof level: 1ATM
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Suitable for: Splashes, rain, hand washing
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Not suitable for: Swimming, showering, or submersion
Classic & Stylish Dual Strap
Two strap options included – switch between styles to match your outfit or activity. (Specific strap materials and colors not specified in images – refer to actual product packaging.)
Complete Product Specifications
| Specification | Details |
|---|---|
| Brand | Colmi |
| Model | C28 |
| Product Type | Smartwatch |
| CPU | JL7074 |
| Flash | RAM 316K, ROM 128M |
| Bluetooth Version | 5.3 |
| Screen Type | AMOLED |
| Screen Size | 1.93 inches |
| Screen Resolution | 368 × 448 pixels |
| Screen Ratio | 90% |
| Battery Capacity | 230mAh |
| Waterproof Level | 1ATM |
| Thickness | 7mm |
| Weight | 39g |
| AI Watch Faces | Yes – AI‑generated custom watch faces |
| Bluetooth Calling | Yes (built‑in speaker and microphone) |
| Health Monitoring | Heart Rate, Blood Oxygen (SpO2), Stress, Sleep, Sedentary Reminder |
| Sports Modes | 100+ |
| Message Push | Yes – texts and social notifications |
| AI Assistant | DA GPT on wrist |
| Dual Strap | Yes – two strap options included |
| App | COLMI Fit |
| App Compatibility | Android 5.0+, iOS 10.0+ |
| Certifications | CE, ROHS, FCC |
| Warranty | Official Manufacturer’s Warranty |
What’s in the Box
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Colmi C28 Smartwatch ×1
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Dual Straps ×2 (two style options)
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Magnetic Charging Cable ×1
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User Manual ×1
(USB wall charger not included.)
Perfect For
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Style‑Conscious Users – Ultra‑slim 7mm design, 39g lightweight, dual strap options
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Fitness Beginners & Enthusiasts – 100+ sports modes, 24/7 health monitoring
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Daily Commuters – Bluetooth calls, message notifications, long battery life
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Tech Lovers – AI watch faces, DA GPT assistant, AMOLED display
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Gift Giving – Classic & stylish design, complete feature set, great value
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Students & Professionals – Stay connected without constantly checking your phone
Your Guarantee of Authenticity
When you choose Top Tech Zone, you choose confidence. This smartwatch is:
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100% Authentic: Guaranteed genuine Colmi product with full manufacturer specifications.
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Backed by an Official Warranty: We ensure complete support for your purchase.
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Engineered for Style & Performance: From 1.93″ AMOLED display to AI watch faces and Bluetooth calling, every feature is designed to be your first smartwatch – classic, stylish, and smart.
AMOLED display, ultra‑slim body, AI watch faces, and Bluetooth calling – classic style meets smart technology. Click ‘Add to Cart’ to get your authentic Colmi C28 AMOLED Display Ultra Slim Bluetooth Calling Smartwatch today, only from Top Tech Zone.
Shop 100% Authentic Gadgets with Warranty: ttzbd.com.














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