COLMI C28 Smartwatch Black + Brown Leather Strap

COLMI C28 Smartwatch

The COLMI C28 is an ultra-slim smartwatch, measuring just 7 mm thick and weighing 39 g. It combines an elegant design with a range of smart, fitness and health features. The built-in Da GPT assistant provides AI support from your wrist, while the 1.93-inch AMOLED display has a resolution of 368 × 448 pixels. The watch supports Bluetooth calls, offers more than 100 sports modes and includes health monitoring features. Its 230 mAh battery provides approximately 4–7 days of operation, depending on use.

AI assistant

The ChatGPT-based Da GPT assistant provides AI support directly on the watch. Use it to get answers to questions, check information and access content-generation features without reaching for your phone.

Slim, lightweight design

The 7 mm-thick case and 39 g watch weight are designed for comfortable all-day wear, whether you are working, exercising or relaxing. The zinc-alloy case has a glossy finish, and the brown leather strap complements the black watch. The strap is interchangeable.

AMOLED display

The 1.93-inch AMOLED display has a resolution of 368 × 448 pixels and an approximately 90% screen-to-body ratio. Its full-screen touch interface and glass screen provide a clear, detailed view of information.

Bluetooth calls and notifications

Make and answer calls directly from the watch using its built-in speaker and microphone. Bluetooth 5.3 provides a connection range of approximately 10 m. The watch can also display notifications from apps such as WhatsApp, Facebook and TikTok. Customise the watch face with a preset design or your own photo.

Health monitoring

The C28 supports 24-hour heart-rate monitoring, blood oxygen saturation and stress measurement. AI-powered sleep analysis covers sleep stages and daytime naps. A movement reminder helps encourage activity throughout the day. Health measurements are intended for general reference and are not a substitute for medical advice.

Sports and activity tracking

Choose from more than 100 training modes, including walking, running, cycling, badminton, yoga, strength training, swimming and many other indoor and outdoor activities. The watch records workout data to help you review activity and track progress.

Water resistance and battery

The watch has 1 ATM water resistance and IP6X dust protection for everyday use, including workouts and rain. The 230 mAh lithium-polymer battery provides approximately 4–7 days of operation and up to 20 days of standby time. Charge it using the included two-pin magnetic cable; charging takes approximately 2–2.5 hours.

Specifications

• Manufacturer: Colmi
• Model: C28
• Colour: Black with brown strap
• Main chipset: JL7074
• Memory: RAM 316K, ROM 128M
• Heart-rate sensor: VC30F
• Bluetooth: Version 5.3; range approximately 10 m
• Display: 1.93-inch AMOLED, 368 × 448 pixels
• Viewing angles: 89° / 89° / 89° / 89°
• Touch interface: Full-screen
• Screen material and fit: Glass; full fit with OCA
• Battery: 230 mAh lithium-polymer
• Protection chip: Seiko Y1
• Charging: Two-pin magnetic cable; more than 300 charging cycles; approximately 2–2.5 hours
• Operating time: Approximately 4–7 days
• Standby time: Approximately 20 days
• Speaker and microphone: Yes
• Case dimensions: 46 × 40 × 7 mm
• Strap: Leather, 20 mm wide; interchangeable
• Case materials: Metal and iML
• Button: One aluminium-alloy button
• Weight: 39 g (listed with silicone strap)
• Compatible systems: Android 5.0 and later, iOS 9.0 and later, HarmonyOS
• App: COLMI Fit
• Water resistance: 1 ATM
• Updates: OTA
• Watch languages: English, Simplified Chinese, Korean, German, French, Spanish, Arabic, Russian, Ukrainian, Italian, Portuguese, Polish and Bengali
• App languages: English, Simplified Chinese, Traditional Chinese, German, French, Arabic, Czech, Greek, Spanish, Japanese, Persian, Italian, Korean, Polish, Portuguese, Russian, Finnish, Swedish, Thai, Hungarian, Slovak, Croatian, Albanian, Turkish and Ukrainian

Training modes

Walking, running, cycling, jumping rope, badminton, basketball, football, climbing, tennis, rugby, golf, yoga, workout, dancing, baseball, elliptical trainer, stationary bike, custom workout, rowing machine, outdoor running, kabaddi, rock climbing, skateboarding, rollerblading, parkour, ATV, paragliding, triathlon, dumbbells, sit-ups, indoor walking, indoor running, stepper, stair climbing, core training, flexibility, Pilates, gymnastics, stretching, strength training, cross-training, aerobics, physical training, wall ball, barbell, deadlift, upper body, functional training, burpees, back, lower body, abs, HIIT, weightlifting, square dance, belly dance, ballet, Zumba, Latin dance, street dance, folk dance, jazz dance, boxing, wrestling, martial arts, Tai Chi, Muay Thai, judo, taekwondo, karate, kickboxing, fencing, kendo, bowling, cricket, volleyball, softball, hockey, table tennis, handball, squash, billiards, beach football, beach volleyball, sepak takraw, skiing, ice skating, curling, other winter sports, snowmobiling, ice hockey, bobsledding, luge, archery, darts, tug-of-war, hula hooping, kite flying, horseback riding, Frisbee, equestrian sports, car racing, track and field, sailing, water polo, other water sports, paddleboarding, water skiing, kayaking, rafting, rowing, motorboats, fin swimming, scuba diving, artistic swimming, snorkelling, kitesurfing and open-water swimming.

Included

• COLMI C28 smartwatch
• Magnetic charging cable
• User manual