CS253 1.57 inch TFT Touch Screen 5ATM Waterproof Smart Watch, Support Sleep Monitoring Heart Rate Monitoring Sport Mode Incoming Call & Information Reminder 1. Main control: MTK2523D, heart rate: Goodix 3011, blood oxygen: Goodix 3011, scientific sleep: Goodix 3011 2. Screen: 1.57 inch high resolution color screen, resolution: 320*360 3. Battery: Lithium battery 300mAh-3.8V, battery life: 5-7 days 4. Material: metal middle frame + ABS + PC bottom shell + liquid silicone wrist strap + MIMO wrist strap buckle assembly 5. Charging method: magnetic charging 6. Support Bluetooth: BLE4.2, compatible system: Android: 5.0iOS 10.0 7. Health function: Heart health monitoring (screening for arrhythmia), accurate blood oxygen detection, scientific sleep (REM), breathing training, stress evaluation, 24-hour heart rate monitoring 8. Sports: 18 kinds of sports cover most of the daily sports scenes, automatic movement recognition, field expansion compass function, exercise time recording 9. Screen display: automatic adjustment of screen brightness, custom dial on APP (changeable when shooting) dial dynamic graph, APP push dial multiple excellent dials to choose 10. Powerful functions: incoming callalarmschedule reminder, message display, steps, calories, standing reminder, 24-hour heart rate graph, remote control, one-touch shooting, do not disturb mode, flashlight lighting 11. Language: The watch firmware comes with 9 languages, the APP supports more than 20 voices, and supports multiple languages ​​around the world. 12. Powerful HIIT animation coach to help you better achieve the effect of high-intensity exercise 13. Interesting interaction: pets are kept in captivity, the calorie value consumed every day, raising small animals, a lot of fun 14. Charging time: 2H 15. Size: 44x38x10.5mm