Features: This smart bracelet is supported by an application called Da Fit. The APP supports the iOS 8.0 version above and Android 5.1 version above. The APP has a variety of sports patterns, has an operation view pedometer, calorie counting, and can sync data across your device and watch. The watch is equipped with full touch. 4-inch screen with a resolution of 240 x 240. It is also equipped with a built-in 170mAh battery that has a working time of about 5-7 days and has a standby time of about 18-25days. This fitness tracker has a dynamic heart rate monitor and sleep quality monitor and can also record your exercise movements, count your steps, calorie intake, monitor your heart rate, sleep, and blood pressure. It can also function as a stopwatch, control your camera and play your music. Smartwatch supports the following languages: English, Russian, Spanish, Portuguese, Japanese, Korean, German, French, Arabic, Ukrainian, Italian, Indonesian, Thai, Chinese, Traditional Chinese. Specifications: Color: black, pink, gold, blue, gray Size: 1.4 inch Material: Body: Plastic + Aluminum Alloy, Wristband: Silicone + Stainless Steel Wristband Size: Total length: 255MM, adjustable length: 155-235MM Weight: 128g Charging Time: 2.5 hours Usage Time: 5-7 days use, 25 days standby Battery capacity: 170mAh Protection Level: IP67 Wireless distance: 5m (inclusive) -10m (inclusive) Compatible system: Android5.1, IOS8.0 Bluetooth: BT4.2 APP: Da Fit Package Includes: 1 x Smart watch 1 x User manual 1 x USB Cable