Display type: TFT color touchscreen 1.06 inches USB port: Yes Bluetooth version: 4.0 BLE Housing colour: Black/Black Type: Activity tracker with smart notifications Functions: Smart notifications Sleep monitoring Pedometer Music control Camera remote Anti-lost alert Other features: Water resistance: *IP67. Standby time: up to 5 days. Memory: 7 days of activity. Operating temperature: -20°C to +40°C. Compatibility: FREE MOBILE APP -iOS & Android mobile compatible applications, performance reports, easy settings Built-in battery: Yes Charger: Ultra-small USB magnetic charger (cable included). Producer product name: Zefit4 HR Producer product family: Smartwatch Display resolution: 160 x 64 pixels Battery capacity: 80 mAh Accelerometer: Yes Vibrating alert: No Touchscreen: Yes Bluetooth: Yes Heart rate monitor: Yes Built-in speaker(s): No Built-in microphone: No GPS (satellite): No Weight: 17 g Waterproof: No Warranty: 24 month(s) Gross weight: 0.16 kg Net weight: 0.06 kg