DW35PRO 1.75 inch Color Screen IPX7 Waterproof Smart Watch, Support Bluetooth Answer & Reject Sleep Monitoring Heart Rate Monitoring, Style: Silicone Strap 1. Bluetooth: BLE5.0 2. Waterproof level: IX7 3. Main control chip: MT2502C 4. Storage: built-in RAM 64MB + ROM 128MB 5. Display: 1.75-inch high-definition color screen, resolution: 320*385 pixels 6. Battery capacity: 200mAh 7. Charging time: about 1.5 hours 8. Standby time: 2-7 days 9. Material: zinc alloy case + IMIL back cover + liquid silicone strap 10. Support mobile phone system: iOS10.0 or above; Android 4.4 or above 11. Wristband UI language: Simplified Chinese, English, French, German, Spanish, Portuguese, Italian, Russian, Polish, Arabic, Thai, Vietnamese, Traditional Chinese, Romanian, Turkish 12. APP supported languages: English, French, German, Spanish, Portuguese, Italian, Russian, Polish, Turkish, Arabic, Thai, Hebrew, Simplified Chinese, Vietnamese, Romanian 13. Functions: Bluetooth answerreject, pedometer (exercise time, mileage, calories), exercise mode (strike, outdoor running, mountain climbing, cycling, basketball, badminton, table tennis, football), heart rate monitoring, blood pressure monitoring , Blood oxygen monitoring, ECG measurement, sedentary reminder, sleep monitoring, caller IDreminder, message push, shake to take pictures, Bluetooth music playback, stopwatch, alarm clock, calendar, calculator, etc. 14. Size: 44x39x11mm Note: The shipment is a double strap: silicone + nylon strap, the strap can also be used for Apple Watch 42-44mm