1.22 inch round screen display, IPS full view and full fit Easy to change strap, standard 20mm Time display, step count, calories, distance, heart rate, sleep time, switch on or off display Standard sports functions (step counting, cycling, distance, calories) Sleep monitoring (sleep time, sleep quality) Incoming call notification, information reminder, multi-language push Anti-lost reminder (the phone will remind you when the band is out of range) Task reminders (sitting reminders, drinking water reminders) Sync data to APK or APP APP: iwear Reminder: (IOS system is in the Apple Store, Android phone is searched in the app treasure iwear APK) Specifications: System requirements: Android 4.4 and above, IOS 8.0 and above, Bluetooth version: BLE 4.0 Main control chip: MTK2502C-ARM7 Memory: 128MB and 64MB Screen resolution: 240 x 208 Battery capacity: 240mAh Standby time: about 3-5 days Working time: about 2-3 days Charging or Downloading: Magnetic Charging Pogo pin Speaker: Handsfree Motor: built-in, vibration reminder Waterproof rating: IP67 Sensor: gravity sensor Machine size: 43 x 11.8mm