Smart wrist band is a smartband with app, build-in integrate Blutoooth 4.0, 3D Sensor, PC cloud service, help people to improve healthy, save time to check smart phone frequently and remind smartly, save time to check smart phone frequently and remind smartly. It can communicate with smart phone with Bluetooth 4.0 which is super low energy. It also can upgrade via Bluetooth, it means it can improve it self by firmware changing.