Screen: 1.43 inch AMOLED, 466*466 pixels, 391 PPI, up to 1000nit brightness, Corning Gorilla Glass GPS Positioning: Integrated GPS/GLONASS/GALILEO/BEIDOU. Assisted GPS for fast fix times. Sensors: Gravity sensor, Proximity sensor, Accelerometer. Health Monitor: Wrist Heart Rate Monitor, Pulse Ox Blood Oxygen Saturation Monitor Connection: BLE 5.3 Battery Capacity: 400mAh Li-polymer battery. Standby time in power-save modes: up to 45 days Training time in power-save modes: up to 18 days Charging Method: magnetic charging Theoretical Charging Duration: Approx. 1.5 hours Health Features: Activity Tracking, Heart Rate, Blood Oxygen, Sleeping Monitoring, Breathing Exercise, Menstrual Cycle Tracking, 100+ Sports Modes Lifestyle Features: Bluetooth Phone Calls, Controls Smartphone Music and Camera, Phone Call Notifications, SMS Notifications, App Notifications, Find My Phone, Time/Date, GPS Time Sync, Automatic Daylight Saving Time, Stopwatch, Timer, Alarm Clock, Weather Sync(Check weather in the next four days), Raise to Wake, Sedentary alert, Drink Water Reminder, Medication Reminder, Events Reminder APP: Zeblaze Fit (Android 4.4 or iOS 8.2 and above) Body Material: Zinc Metal Bezel+Drilling Carbon Coating Dimensions: 46.3x46.3x14.8 mm Weight: 60g with wristband Wristband: silicone, 22mm width, 130-235mm length