Brand: Amazfit Model: Bip U Display: Type: Transflective Touch TFT Size: 1.43 “ Resolution: 320 x 302 px Brightness level: Fixed Glass: 2.5D Curved Connectivity: Bluetooth: Yes, 5.0 BLE WiFi: No 2G / 3G: No GPS: No NFC: No Compatible with Android 4.4 or higher and iOS 8.0 or higher Microphone: No Speaker: No Mobile Phone Music Control Vibration: yes MiFit APP (Android and iOS) Interface: Physical button: Long press off: Turn on Short press on: Activate screen – Standby Long press on: Turn off Charging Slot: Inductive charging connector Resistance: 10meter (we recommend not to submerge it) Camera: No Sensors: Heart rate sensor: Yes, BioTracker 2 PPG Biological Optical Sensor Accelerometer: Yes Gyroscope: Yes Geomagnetic Sensor: No GPS: No Functions: Call alert SMS alert Application alert: (Facebook, Whatsapp, Twitter, Telegram, etc …) Watch Calendar Synchronization: Push – Manual Distance meter Pulsometer Step meter Notice for sedentary lifestyle Weather forecast Running mode Speedometer Control burning calories Sleep control Alarm Data history Sport modes: more than 60 Battery: Capacity: 230 mAh Autonomy duration average use: Up to 9 days Charging type: Wireless charging Charging time: 2 hours Design: Material: Ceramic / Silicone Dial: Square – Silicone / Ceramic Strap: Silicone Dimensions: 40.9 x 35.5 x 11.4 mm Weight: 31 gr (with strap) Colour: Black Packing content: 1 x Amazfit Bip U 1 x USB Charging Cable 1 x User Manual