1. Compatible system: Android 4. and above, IOS9.0 and above 2. Memory: RAM: 160K, ROM: 384KB, FLASH: 64Mbit 3. Screen: 1.69 inches TFT color screen, 240*280 4. Bluetooth version: 5.0 5. Battery capacity: 180mAh 6. Charging method: USB dedicated charging cable 7. Charging time: about 2H 8. Battery life: about 7 days of use, 30 days of standby 9. APP supported languages: Simplified Chinese, Traditional Chinese, English, French, Russian, Indonesian, German, Italian, Czech, Japanese, Polish, Portuguese, Spanish, Arabic, Korean 10. Band language: Simplified Chinese, Traditional Chinese, English, French, Russian, Indonesian, German, Italian, Czech, Japanese, Polish, Portuguese, Spanish, Arabic, Korean, Dutch, Hindi 11. Functions: weather forecast, step counting, heart rate monitoring, sleep monitoring, sedentary, mileage, blood oxygen monitoring, blood pressure monitoring, search, calories, Bluetooth, message push, alarm setting, drinking water reminder, smart gesture control, do not disturb Pattern etc. 12. Material: body: zinc alloy + spherical tempered glass, wrist strap: silicone strap 13. The total length of the wristband is 220MM, the adjustable length is 145-190MM 14. Bracelet size: 43.6x36x9.4mm