COLMI C28 Gold Smartwatch

COLMI C28 Gold 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 and fitness features, including the Da GPT AI assistant, Bluetooth calling, more than 100 sports modes and health monitoring. Its 1.93-inch AMOLED display has a resolution of 368 × 448 pixels, while the 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 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 weight, including the silicone strap, are designed for comfortable all-day wear. The zinc-alloy case has a glossy finish, and the strap is designed to sit comfortably on the wrist. The strap is interchangeable.

AMOLED display

The 1.93-inch AMOLED touchscreen has a resolution of 368 × 448 pixels and a 90% screen-to-body ratio. It displays clear, detailed images and supports customisable watch faces, including pre-designed options and personal photos.

Bluetooth calls and notifications

Make and answer calls from the watch using its built-in speaker and microphone. Bluetooth 5.3 provides a range of approximately 10 m. The watch can also display notifications from apps such as WhatsApp, Facebook and TikTok.

Health and activity tracking

The C28 supports 24-hour heart-rate monitoring, blood oxygen saturation and stress measurements, as well as AI-assisted sleep analysis covering sleep stages and daytime naps. A movement reminder helps encourage regular activity. More than 100 training modes are available, 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 your activity and progress.

Battery and protection

The 230 mAh lithium-polymer battery provides approximately 4–7 days of operating time and up to 20 days on standby. Charging takes approximately 2–2.5 hours using the included two-pin magnetic cable. The watch is rated 1 ATM for water resistance and IP6X for dust protection. Water resistance is intended for everyday exposure such as rain and workouts; it is not a guarantee of suitability for swimming or diving.

Specifications

• Manufacturer: Colmi
• Model: C28
• Colour: Gold
• 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
• Touchscreen: Full-screen touch
• Screen material and fit: Glass; full fit with OCA
• Battery: Lithium-polymer, 230 mAh
• Protection chip: Seiko Y1
• Charging: Two-pin magnetic cable; over 300 charging cycles
• Charging time: 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
• Case material: Metal + iML
• Buttons: One aluminium-alloy button
• Strap: Silicone, 20 mm wide; interchangeable
• Weight: 39 g 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