Diameter: 44mm Thickness: 12mm Strap Width:20mm Weight: 34g Mechanical Waterproof IP68 Screen size 1.54" Screen type TFT-LCD, color screen Screen cover 1.8 High hardness glass cover Strap material TPU hardness 65±3 degrees Buckle Silica gel hardness 75 degrees Tongue buckle TPU hardness 65 degrees Hardware MCU RTL8752CMF IMU (acceleration + gyroscope) STK8321 PPG heart rate sensor VC31B Motor 1027 Motor Screen Resolution 240*240 Flash 64Mb BLE BLE5.0 BLE antenna module FPC Power Operating Voltage 3.8V Battery capacity 260mAh Battery type Lithium polymer battery Charging method Magneto-suction charging Charging time ? 2.5 hours APP OS iOS iOS 10.0+ Android Android 6.0+ Function Multi-language support 15 languages(Russian, Indonesian, German, Italian, Czech, Japanese, French, Polish, Simplified Chinese, Traditional Chinese, English, Portuguese, Spanish, Arabic, Korean) Basic functions Clock, date display (12/24 hour system, default 12 hour system) Multi-dial OTA upgrade (Upgrade directly via the BLE connection app) Daily activity monitoring Heart rate (24-hour real-time heart rate monitoring) Sleep (excluding short break): falling sleep time, wake up time, total sleep time.) Steps (Monitor the number of steps per minute and record it every 10 minutes) Calorie (Monitor calories per minute and record it every 10 minutes) Distance (Monitor the distance per minute and record it every 10 minutes) Sports functions Running Walking Riding Rope Skipping Climbing Badminton Table Tennis Tennis Yoga Basketball Soccer Baseball Spinning bike Treadmill Rowing Jumping Jack Dancing Volleyball Cricket Hockey Gymnastics Sit-ups Football Autonomous measurement Heart rate measurement (User self-measurement, single heart rate monitoring) Notifications Calling Notification (Incoming call received, an alert is displayed; You can hung it up by watch.) Sedentary reminder (This reminder appears when the user is sedentary more than an hour, reminding the user to stand up and do some exercise) SMS notification (The phone receives SMS message push anddisplay it to watch.) App notification (Push notifications from other apps in watch by your choice) Alarm reminder Other functions Weather forecast Firmware information(View device related information (firmware version, BLE address, etc)) Sports record Reset function Music control (Control your smartphone to play music.) Gesture Swipe right to return(Except the horizontal sliding page, other pages slide right to return to the previous page) Lift the wrist (Lift the wrist to automatically brighten) lay down (Put down the automatic shut down screen)