COLMI C28 Smartwatch Silver + Brown Leather Strap

COLMI C28 Smartwatch

The COLMI C28 is an ultra-slim smartwatch, just 7 mm thick and weighing 39 g, combining an elegant design with a wide range of functions. Its built-in Da GPT assistant provides quick answers and information, while the 1.93-inch AMOLED HD display with a resolution of 368 × 448 px delivers a clear image. 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 from the watch. Use it to get answers, check information and access content-generation features without reaching for your phone.

Slim, lightweight design

The 7 mm-thick case and 39 g weight are designed for comfortable all-day wear. The slim profile suits work, exercise and everyday use. The zinc-alloy case has a glossy finish, and the silver colour is paired with a brown leather strap. The strap is interchangeable and 20 mm wide.

AMOLED display

The 1.93-inch AMOLED display has a resolution of 368 × 448 px and a 90% screen-to-body ratio. Its wide colour range and clear image make information easy to view in different lighting conditions. The full-screen touch display uses glass with a full-fit OCA construction.

Bluetooth calls and notifications

Make and answer calls from your wrist using the built-in speaker and microphone. 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 and activity tracking

The C28 monitors heart rate around the clock and measures blood oxygen saturation and stress levels. AI-powered sleep analysis covers sleep stages and daytime naps, while movement reminders encourage regular activity. More than 100 sports modes cover activities including walking, running, cycling, badminton, strength training, yoga, swimming and many others. Workout data helps you review activity and track progress.

Battery and protection

The 230 mAh lithium-polymer battery provides approximately 4–7 days of operating time and up to 20 days of standby time. Charging uses the included 2-pin magnetic cable and takes approximately 2–2.5 hours. The watch is rated 1 ATM for water resistance and has IP6X dust protection. The manufacturer specifies more than 300 charging cycles.

Specifications

• Manufacturer: Colmi
• Model: C28
• Colour: Silver 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 px
• Viewing angles: 89° / 89° / 89° / 89°
• Touch: Full-screen
• Screen material and construction: Glass, full fit with OCA
• Battery: 230 mAh lithium-polymer
• Protection chip: Seiko Y1
• Charging: 2-pin magnetic cable; approximately 2–2.5 hours
• Charging cycles: More than 300
• Operating time: Approximately 4–7 days
• Standby time: Approximately 20 days
• Speaker and microphone: Yes
• Case dimensions: 46 × 40 × 7 mm
• Strap: Brown leather, interchangeable; 20 mm wide
• Case materials: Metal + iML
• Button: One aluminium-alloy button
• Weight: 39 g (specified 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

• Smartwatch
• Magnetic charging cable
• User manual