Model: K37 version: BLE 5.0 Main control chip: Dialog 14695 GPS chip: BCM47755 (ceramic antenna) Memory: Flash 128MB Screen resolution: 360*360 Battery capacity: 480mAh Standby time: about 40 days Working time: about 5-10 days Motor: built-in, vibration reminder Net weight: 57.8g APP: InfoWear Machine size: 46*46*13mm Box size: 170*76*35mm System requirements: Android 4.4 and above, IOS 8.0 and above Specifications: 1.32 inch IPS full circle full viewing angle Easy to replace strap, standard 22mm A variety of dial push, custom dial music, weather display Women's menstrual cycle reminder 480mAh large battery, long standby time, the screen display is very bright outdoors Time display, step counting, calories, distance, heart rate, blood oxygen, sleep time, switch display, stopwatch, multi-sport mode, etc. Multi-language (Japanese, English, German, Russian, Spanish, Italian, Polish, Portuguese, Hindi), default English Sync data to APK/APP, APP: InfoWear (scan QR code to download "InfoWear") Package Included: 1*Smart Watch 1*Charging cable 1*Instruction 1*Packing box