Product Parameter Watch model: C20 Pro Main Chip: 8763EWE Memory: 128M Display: 1.83 inch, 240*286 HD resolution BT: 5.0 Heart rate sensor: HR3605 Step counting: XiRui QMA6100P, accurate pedometer Charge method: 2PIN Magnetic Cable Battery: 380mAh Cobalt Polymer Batteries Waterproof: IP68 Compatible system: Android 6.0 and above, IOS 9.0 and above Wristband: Silicone strap, 22mm width, total strap length 265mm, adjustable zone 170-248mm Features 8763EWE,128M large memory, Bluetooth 5.0 protocol; Support BT call, one key connection, call scene more convenient;. Cool UI, support drag and drop operation + shortcut center function; Ultra-large memory, eight Adultu modes, rich UI scenarios, more intelnt watches; 123 sports modes, suitable for more sports scenes; 1.83-inch HD large screen, resolution 240*286. HR3605 low power consumption HD degree of heart rate and blood oxygen, detection is more accurate. IP68 depth waterproof, suitable for more environAdultt wear; APP Functions APP Basic features Dialing, frequently used contacts, call logs, pedometer, sleep, heart rate, workout, blood pressure, weather, camera control, blood oxygen, music control, stopwatch, alarm, timer, sedentary reminder, breathing training, calculator, messages, brightness adjustAdultt, mute, QR code, shortcut center, find your phone, heart rate alert, voice assistant, stress monitor. 123 sports Walking, running, cycling, jumping rope, badminton, blue ball, soccer, swimming, tennis, rugby, golf, yoga, gym, dancing, baseball, elliptical machine, rowing machine, cross-country running, skiing, bowling, dumbbells, sit-ups, free training, hiking, and other 123 sports Dynamic heart rate All-day dynamic heart rate trend and data analysis Oximetry Support red light and infrared light sensor to measure blood oxygen saturation. Message and call alerts: Phone, SMS, WeChat, QQ, Facebook, Twitter, Instagram, Skype,