Watch size: 44mm / Screen size: 1.75 inch / Charger: Wireless charging / Battery: 280mAh Li-ion battery / Notifications: Synchronous incoming messages notification from Notification Center in your phone (SMS, Facebook, INS, Twitter, etc.), incoming call reminder / Calls: Make & Answer calls after connect Bluetooth with smartphone / Heart rate detection: Monitoring your heartbeat / Steps: Steps counting, Calories, distance monitor / Sedentary reminder: Set time to reminder you to sport, changing the unhealthy lifestyle / Sleep monitoring: To record and analyze your sleep status objectively and scientifically / Password/Find Phone: Anti-lost, Ring your phone or watch, you could set password in your watch / Phone Book, you could add eight important contacts to your watch & make calls easily / Sport Modes: Running, Walking, etc.