About Product 1. System requirements: Android 4.4 and above, IOS 8.0 or above 2. Bluetooth version: BLE 5.0 3. Battery capacity: 180mA/h (depending on the shell material) 4. Theoretical standby time: 15 days 5. Theoretical working time: 5-7 days Features 1. Heart rate detection, blood pressure detection, time display, step counting, calories, distance display, Standard sports functions (step, distance, calories), sleep monitoring (sleep time, sleep quality), call reminder, SMS, QQ, WeChat message content push, WeChat sports access, raise your hand to brighten, find mobile phone, anti-lost reminder (Mobile phone out of range reminder), sedentary reminder, call rejection, alarm reminder, a variety of sports modes (running, skipping, swimming, cycling, tennis, badminton, table tennis, etc.), shake a photo, moving target setting , do not disturb mode, task reminder