Specification Basic Information Display 1.78 inch AMOLED Touch screen, 390*450 pixels, 341 PPI, Up to 1,000nit brightness Corning Gorilla Glass Always on display Battery 180 mAh Li-Pol Standby time in power-save mode, up to 40 days Training time in power-save modes, up to 15 days Training time with full GPS and HR tracking enabled, up to 40 hours Charging time: 1.5 hours Connectivity Bluetooth 5.0 Material Durable and comfortable fluoro rubber strap OS Android 4.4 or iOS 8.2 and above SpecialFeatures Water resistance: 5 ATM (WR50) Sensor GPS: Integrated GPS, GLONASS, GALILEO, BEIDOU. Sensors Assisted GPS for fast fix times Health & Movement: Wrist Heart Rate Monitor, Pulse Ox Blood Oxygen Saturation Monitor, Proximity sensor, Accelerometer Exterior Dimension Width: 37 mm Height: 45 mm Thickness: 10.5 mm Width: 22 mm, Compatible with standard 22 mm quick-release watch bands Wrist Circumference: 130-220 mm Weight Weight: 42.4 g Total weight without wristband: 23.8 g Color Black Warranty Information Warranty 6 Months
