Fitness will never be boring with these pretty wristbands. Wear them to gym or catch a bus will record all your activities. A must accessory for Young Modern Woman.Fbandz Akira64 Fitness SmartBand with 1 black Replacement band is made by TPU Polymer composite materials, containing features like light, high resistant and high damage resistance. Bluetooth 4.0, using international first-line sensor, it will be a good one has accurate data synchronization, miss no in-calling and accurate calculation of sport and sleep. Functions: 1. Pedometer: can count steps, distance and calories. 2. Sleeping monitor. Can detect your sleeping quality. 3. Time display. Can be used as a watch. 4. Sedentary reminder. In-call reminder, sedentary reminder, drinking reminder, wake up alarm etc. 5. Call and message reminder (only support android phone). 6. Remoter camera.Please download & install Getfit 2.0 App on your smartphones to SYNC with your smart band, and follow the instructions given in the user manual.