iOS: Support 10.0 and above systems, of which 13 and above support dual-mode onekeylink function, BT below 13 needs to be connected to the mobile phone Bluetoothsystem settings Android: Support 5.0 and above systems Hongmeng: All support Powerful functions: real blood oxygen, third-generation blood sugar, stress report,HRV report, 24-hour sleep monitoring, Meto report; step counting, distance, calories,calls, voice assistant, heart rate, blood pressure, body temperature test, breathingtraining, music Play, stopwatch, timer, calculator, weather display, women's menstrualperiod tracking, remote control camera, raise wrist to brighten the screen, find mobilephone, call reminder (caller number/name), message notification reminder, alarm clockreminder, sedentary reminder, heart rate alarm Reminder and other dials: 6 defaultdials + 1 market dial + 1 custom dial 150 types: Running: 10 sports, cycling: 5 sports, outdoor sports: 11 sports, indoorsports: 31 sports, dance sports: 16 sports, fighting sports: 12 sports, ball games : 30sports, ice and snow sports: 13 sports, leisure sports: 12 sports, chess and card sports: 5sports, other sports: 5 sports 1.43" retina screen resolution: 360*360 (sRGB high color gamut) Bluetooth 5.3 battery capacity:3.8V/300mAh Standby time Full function: 5-7 days, default option: 10-13 days, standby: 45 days charging time:about 2 hours Operation: full touch Package:1pc