Fangrui Product Details 1. Lc21 1.32 Inch Tft Round Screen Sports Smart Watch Supports Blood Oxygen Monitoringcall Reminder 2. Case: Tpu+abs 3. Strap Material: Tpu 4. Cpu: Ab5681g 5. Display: 1.32-inch Tft Lcd 6. Resolution: 360*360 7. Bluetooth: Support Ble5.4 8. Cpu And Flash: Ram: 210k + 72kbflash 9. Rom: 128mb Flash 10. Heart Rate Sensor: Tianyi Hexin Hx3602 11. Battery: Polymer Lithium Battery 300mah 12. Charging Method: Magnetic Charging 13. Charging Time: 2 Hours 14. Bluetooth Effective Distance: 10 Meters 15. Waterproof Level: Ip68 16. Battery Life: More Than 15 Days 17. Support System: Compatible With Ios 11.0, Android 5.0 And Above System Versions 18. Watch Built-in Language: Simplified Chinese, English, Spanish, Portuguese, German, Italian, French, Russian, Polish, Swedish, Danish, Vietnamese, Persian, Albanian, Arabic, Hebrew, Thai, Croatian, Turkish, Czech, Dutch, Ukrainian, Burmese, Hindi, Malay, Finnish 19. Product Functions: Flashlight, Compass, Pedometer, Sleep, Heart Rate, Blood Pressure, Blood Oxygen, Call Reminder, Multi-sports Mode, Find Phone, Dial Selection, Stopwatch, Sos, Music Control, Play Music, Answer Call, Sedentary Reminder, Water Drinking Reminder, Alarm Clock, Raise Hand To Light Up Screen, Dial Change, Etc.