Appearance material: zinc alloy + IML process case, electroplated anti-fingerprint strengthened mineral glass mirrorCharging time: 4 hoursDuration of use: 3—10 daysWaterproof grade: IP67 waterproofChip: Realtek 8762DKCompatible system: IOS, Apple IOS 10.0 or above / Android system, support Android 4.4 and aboveFLASH memory: 128MB 130 sports modesScreen size: 1.46 inch IPS full viewing angle color screenResolution: HD 360*360Bluetooth: Dual Bluetooth 5.0Heart rate: Zhan Heng BD1662_I2C (true heart rate true blood oxygen)Charging method: wireless chargingBattery capacity: 3.7V/315mAh (lithium battery 551833 with protection board)APP software: WearproApp languages: Chinese, English, German, Russian, Spanish, Portuguese, French, Japanese, Italian, Polish, Korean, Arabic, Farsi, Thai, Vietnamese, Chinese Traditional, Greek, Romanian. Turkish, Hebrew, Czech.Supported languages: English, Chinese, Chinese Traditional, Danish, Greek, Latin, Romanian, Turkish, Hebrew, Czech, Polish, Spanish, German, Russian, Portuguese, French, Japanese, Italian, Vietnamese, Korean, Arabic, FarsiFunctions: Breathing training, dial push, stopwatch, brightness adjustment, multi-sport mode, sleep, heart rate, information, remote music, remote photo, weather, find mobile phone (connect mobile phone to use), Bluetooth call, Bluetooth music playback, password protection, calculator, split screen display, quick widget, meteorology, massager, Alipay, My QR code