Built-in 150mAh rechargeable battery, long standby time, long battery life.IP67 waterproof, water resistance from raining, hand washing and splashing water.Monitor your heart rate and blood pressure, let you know your health status.Support sleep monitoring, can monitor your sleep status and help you improve sleep quality.Item Name: Smart BraceletStrap Material: SiliconeCase Material: Zinc AlloyCPU: TLSR8266Memory: 16KB + 512KBScreen Resolution: 240*240Screen Type: TFTBluetooth Version: 4.0Battery Capacity: 150mAh (Included)Charging Type: Electromagnetic AdsorptionCharging Time: 1-2 HoursWorking Time: 5-7 DaysStandby Time: 10-15 DaysWaterproof Level: IP67Supported System: for Android 4.4 and above, for iOS 9.0 and aboveLanguages: Chinese, English, Japanese, Turkish, Spanish, German, Russian, Finnish, Arabic, French, Malaysian, Indonesian, Korean, PortugueseFunctions: Heart Rate Monitoring, Blood Pressure/Blood Oxygen Monitoring, Pedometer, Pedometer, Distance, Calorie Calculation, Sleep Monitoring, Sedentary Reminder, Call/Message Reminder, Alarm Clock, Remote Camera, Find My Device, Time Sync, Multiple Sports Mode, etc.Features: Waterproof, Bluetooth, MultifunctionalStrap Size: 22cm x 1.8cm/8.66" x 0.71" (Approx.)Overall Size: 8cm x 4cm x 2.5cm/3.15" x 1.57" x 0.98" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Smart Bracelet1 x Charging Cable1 x User Manual