This smart bracelet has multi-functional application to help you build up a more fine and regular life.Features:Your healthy monitor: Help you to keep good habits, fitness and happiness.TW64 will record your steps, distance and calorie,which can help you get to your target.Smart reminder: In-call reminder, sedentary reminder, drinking reminder, wake up alarm etc.TW64 is made of TPU Polymer composite materials, containing features like light, high resistant and high damage resistance.Light as feather, with advanced coloring and never fade, you are comfortable while wearing TW64 which made with ergonomics, tested with 48 different position.Waterproof IP67: The IP67 rating allows the bracelet to be held under water for a maximum of 30 minutes at a depth of 1 meter.(please don't wear it while diving).BT 4.0 version, using international first-line sensor, has an accurate data synchronization, miss no in-calling and accurate calculation of sport and sleep.Function description: step counts, distance measuring, calorie consumption, management, sleep management, event trigger, call reminder,message reminder, clock, sedentary reminder, remote camera, vibration alarm clock and more.Specifications:Shell material: aluminum alloyStrap material: soft rubberColor: black, blue, orange, rose red, green, grey (optional)Operating system: IOS 7.1, Android 4.4 and aboveBattery: polymer rechargeable lithium battery, 3.7V 50mAh (built-in)Display screen: 0.49inCharging: 5.0V, USB chargingItem size: 242 * 21 * 11mm / 9.5 * 0.8 * 0.4inPackage size: 155 * 95 * 35mm / 6.1 * 3.7 * 1.4inPackage weight: 65g / 2.3ouncePackage List:1 * Smart Bracelet