Parameter APP: gloryFit Screen Size: 1.96 Inches Screen Resolution: 240*282 Screen Type: Full Touch Screen Battery Capacity: 420mAh Charging Method: Magnetic Suction Charging Bluetooth: BT 5.2 Strap w more→idth: 220mm Screen Diagonal: 1.96" Waterproof Rating: 3ATM Heart Rate: Yes Pedometer: Yes Calorie Counter: Yes Compatibilite : Android 4.4+ ,IOS 9.0+ Bluetooth:5.2 Function parameter: 1>Bluetooth function: one-click link, Bluetooth call, voice assistant, SOS 2>Exercise records: steps, distance, calorie calculation, multiple exercise modes 3>Message push: information prompts, other reminders (QQ, WeChat, WhatsApp, Line, etc. reminders) 4>Health management: