Key Features . 33mm Screen Size5ATM WaterproofUp to 15 days battery with normal usageCall and Message NotificationsMultiple Sport Tracking ModesCompatible with iOS and Android . Stylish Design and; Colorful ScreenThe stylish watch features a 1.3 inch circular display. The stainless steel frame of C3 features a double crown and paired with silicone straps this watch is comfortable and classy. 5ATM waterproofC3 has professional waterproofing that offers protection up to a depth of 50 meters. It can be worn worry-free for daily use or when swimming as it has the same super waterproof ability as the traditional high-end sport watches All-day Heart Rate Monitoring3 features precision 24-hour heart rate monitoring covering heart rate zones and providing warnings when your heart rate is abnormally elevated. Multiple Sport Modes3 features 10 sports modes for many outdoor indoor and training activi- ties allowing it to cover the needs of most sports enthusiasts. Set your own customisable goals with C3 and then beat them. High-capacity BatteryC3 is equipped with a 260 mAh large battery that can last 15 days with normal usage and last 30 days with basic watch mode. Enjoy a full week of activity without worrying about carrying a charger every- where..