Appearance parameters: Dimensions: 42 * 21 * 13mm Strap Technology: silicone material Band length: 150mm-210mmHardware parameters CPU: NORDIC 51822 Display: 0.49 inches OLED (Resolution 64 * 32) Acceleration: LIS3DH HR: You can measure static and dynamic heart rate, the accuracy rate of 95% Battery: Rechargeable lithium polymer battery 60mAH Motor: Built for vibrating alert Charging: 5V / 30mA Waterproof grade: IP54 (life waterproof) Time: use a fully charged about 7 days, 15 days standbySystem parameters Compatibility: iPhone and Android phones System Requirements: Android 4.3 or higher, iOS 7.0, Bluetooth 4.0 Data synchronization: Bluetooth data synced to your phone and sync to the back-side application Data storage: 30 days to save the sport / sleep data APP-compatible languages: Simplified Chinese, English, Russian, Turkish, Greek, German, Italian, French, Netherlands, Portugal, Spain Operating modes: touch button switchFunction parameter Time and date display, battery power display Exercise time, distance, calorie consumption display Heart rate measurement Sleep wristband read directly Remote camera Personal information settings, account binding Motion tracking (counting steps, distance, calories) Polysomnography (sleep time, sleep quality) Fitness Goal Setting Fitness Information Sharing Press the side buttons to switch display Press the side key remote control camera in camera mode Long press to start measuring the heart rate in heart rate mode Calls, SMS, QQ, micro letters to remind Find bracelet Custom Smart alarm reminder Sedentary reminder Drink plenty of water to remind Heart rate can be measured static and dynamic Remote camera Caller hand ring vibrationCompatible phones For iPhone 4S / iOS7.0 + For iPhone 5 / iOS7.0 + For iPhone 5S / iOS8.0 + iPhone 5C / iOS8.0 + For iPhone 6 / iOS8.1 + For iPhone 6 Plus / iOS8.1 + For iPhone 6S / iOS8.2 + For iPhone 6S Plus / iOS 8.2+ For iPhone 5SE / iOS9.0 + Android phone will need to meet: a resolution greater than 720 * 1280, more than 4-inch screenPackage Content: 1PC Pedometer Watch(With retail package) 1PC User Manual