About Product 1. Battery capacity: 230mAh 2. Bluetooth version: BLE5.2 3. Charging method: Magnetic sucker 4. Waterproof rating: IP67 waterproof 5. System: Android system 4.4 version or above,iOS system 8.0 version or above 6. Resolution : 320x386 7. Memory: RAM270KB ROM128Mb 8. Standby time: 7 Days 9. Usage time: 2-3 Days 10. UI languages: English, Chinese, Japanese, Korean, German, French, Spanish, Arabic, Russian, Traditional, Ukrainian, Italian, Portuguese 11. APP Support languages: Danish, Ukrainian, Russian, Bulgarian, Bokmal, Norwegian, Hindi, Indonesian, German, Italian, Czech, Japanese, Pushto, French, Polish, Thai, Swedish, Simplified Chinese, Traditional Chinese, Finnish, English, Dutch, Portuguese, Spanish, Vietnamese, Arabic, Korean Function 1. Heart rate monitoring,blood pressure monitoring,blood oxygen monitoring 2. Step,distance,calorie 3. Sleep monitoring (sleep duration, sleep quality) 4. Dial selection, message push, daily alarm clock, photo control, weather information 5. Find bracelet, time format, do not disturb mode time, all-day heart rate test, turn the wrist bright screen,physiological reminder