1. System requirements: Android 4.4 and above, IOS 8.0 and above, support Bluetooth 5.0 2. Bluetooth version: BLE 5.0 3. Bluetooth chip: Realtek RTL8762DT 4. Heart rate chip: Tianyihexin 3300 5. Bracelet memory: 64M bit flash, 160k byte ram 6. Screen display: 1.32-inch IPS color screen, resolution 360*360 7. Battery capacity: 260MAH 8. Standby time: 20-25 days 9. Working hours: about 7 days 10. Charging interface: magnetic charging base 11. Waterproof grade: IP68 12. Sensor: Limin 3001 13. UI Language: English, Simplified Chinese, Thai, Russian, Spanish, Portuguese, Japanese, French, German, Italian, Traditional Chinese, Korean, Arabic, Hebrew, Hindi, Polish, Dutch, Turkish, Indonesian, Czech 14. Bracelet font language: English, Simplified Chinese, Thai, Russian, Spanish, Portuguese, Japanese, French, German, Italian, Traditional Chinese, Korean, Arabic, Hebrew, Hindi, Polish English, Dutch, Turkish, Indonesian, Czech 15. APP support languages: English, Simplified Chinese, Thai, Russian, Spanish, Portuguese, Japanese, French, German, Italian, Traditional Chinese, Korean, Arabic, Hebrew, Hindi, Polish , Dutch, Turkish, Indonesian, Czech 16. Functions: time and date display, step counting, calories, distance, stopwatch, countdown, heart rate monitoring, blood pressure monitoring, blood oxygen monitoring, sleep monitoring (sleep time, sleep quality), Alipay and WeChat payment functions, information storage, hand Ring brightness adjustment, bracelet MAC address check, bracelet reset, multiple sports modes (walking, basketball, mountaineering, running, feathers, cycling), sleep monitoring (sleep time, sleep quality), standard sports functions (counting Step, distance, calories), GPS track movement, 20 message storage reminders to view, slide to adjust volume and brightness, call reminder, message content push, stopwatch, find mobile phone, reach the target reminder, drink water reminder, raise your hand to brighten the screen, Sedentary reminder, alarm clock reminder, shake to take pictures, WeChat sports access, exercise goal setting, fitness information sharing, weather, find bracelet, call rejection, shake to take pictures, do not disturb mode, etc. 17. Material: ABS+TPU 18. Product size: 45x10cm