Hardware material and mechanical structures Fuselage + plastic sheet decoration Square dial TPU strap material Length of the watch 250mm Screen size 1.3" TFT - LCD Screen cover panel 2.5D high hardness glass Touch screen full touch screen 1 physical keys Waterproof class ip68 MCU Nordic nrf52840 ble 5.0 (256 kb ram, 1mb flash, main frequency 64 MHz, can support USB2.0) stk8321 accelerometer sensor hx3600 heart rate sensor 64MB flash memory Motor vibrating button motor Bluetooth connection ble4.2 can support ble5.0 App os IOS iOS 8.0 or above Android Android 4.4 or higher Power Rated voltage 3.8v Maximum battery power 0.24 Watt Charge capacity the 210mah battery Battery type Lithium Polymer battery Contact type charging interface Charging mode magnetic suction charging (with USB charging cable + needle charging) contact charging (2 electrode points) Charging time about 2.5 hours Lifetime about 10 days Charging time 45 days standby Function Function Multi-language support 6 languages Chinese, English, German, Russian, Japanese, Korean Step monitoring function support< /p> Heart rate monitoring 10*24h heart rate monitoring contains dynamic heart rate Sleep monitoring support (APP side sleep data display) (deep sleep, light sleep, sleep) Calorie monitoring support (shown on the watch side and APP side) visible on the watch side Step counter, calories, speed, distance, active time the sports calendar can be viewed inside the watch to record the last 50 movements Watch with built-in 8 movement modes (9 in total), APP can choose to walk, run, hike, ride, treadmill , fitness, mountaineering, Dynamic bike, yoga 1 - 8 bit built-in by default Daily goal support - set distance, calories, step count on app< /p> Incoming call reminder support hang up The information reminder watch has an information bar Support sedentary reminder (time interval for customizable reminders) Alarm reminder alarm presets (get up, take medicine, go to work, etc.) \ there are associated prompt icons after turning off the reminder alarm (get up, take medicine, go to work, etc.) Stopwatch, timer support Music control support open music app, start, pause, previous next Find mobile support Respiratory training support (regulates user's breathing rate, relaxes mood) Stop, restart support watch side operational stop Date time display The date time interface should display the number of steps, calories, 12 and 24 hour charging support Multi - thin watch face with Multi - dial selection Wearing experience Pro - skin, lightweight design to wear without discipline < p>Ergonomic body Dirt-resistant wristband, easy to wick, sweat Interactive experience Simple, fast and not complex interaction < p>The user interface is bright and clear (mainly display data), with dynamic, technological visual effects Increase the value of product accessories with good visual effects and user experience< /p> Environment Operating temperature - 20C to 40c Operating humidity 10% - 90% RH (non-condensing) Operating temperature storage - 20C to 50c