System requirements: Android 4.4 and higher, IOS 8.0 and higher, Bluetooth 5.0 support Bluetooth version: BLE 5.0 Bluetooth chip Realtek: RTL8762C Screen display: 1.09 inches IPS color screen Battery capacity: 150MAH Standby time: 20 to 25 days Working time: about 7 days Physical buttons: full touch and buttons Waterproof rating: IP68 Sensor gravity sensor: STK8321 Watch languages: Chinese, English, Korean, Japanese, German, Spanish, French, Italian, Italian, Portuguese, Arabic, Russian, Dutch, Hindi, Czech, Polish, Turkish, Indonesian APP supported languages: Simplified Chinese, Traditional Chinese, English, Korean, Japanese, German, Spanish, French, Italian, Portuguese, Arabic, Hindi, Polish, Russian, Dutch, Turkish, Indonesian, Czech

Features
1: 24 exercise modes, heart rate monitoring, blood pressure monitoring, blood oxygen monitoring, step count
2: Time and date display, steps, calories, distance with screen display
3: Sleep monitoring (sleep time, sleep quality)
4: Standard exercise function (steps, distance, calories), GPS track exercise
5: 6 kinds of UI dial display + large dial + custom dial, bridge theme UI, for lovers to use different hug scenes during the day and night, 7 messages are stored for viewing
6: Call reminder, SMS, QQ, WeChat, Ding, Wang Zhen, Sina Weibo, Instagram, linkeln, Snapchat, burst, Facebook, Skype, Twitter, WhatsApp, Line, KakaoTalk message content delivery

7: Stopwatch, look for mobile phone, raise hand to indicate screen, sedentary reminder, alarm clock (5), shake photo
8: Weather, smart alarm clock, light curtain with hand raised, light curtain time, search phone, search bracelet, refuse to call, shake to take pictures, do not disturb mode (do not disturb time setting, turn off bracelet vibration, turn off information reminder )

9: Application name: Tefiti
SUOTA function: update bracelet firmware to automatically synchronize data to APK/APP, history query, APP help: solve general problems
Tefiti alert: (IOS search Tefiti in the Apple store to download and install; Android system is provided in the Chinese app treasure, and search for download and install in Google Tefiti abroad.)

Note: The measurement principle of wearable devices is completely different from that of medical devices. Only for sports and fitness reference, thank you.