The Nuband Activ2 is super slim and allows you to set daily, weekly and monthly workout goals and also helps you to achieve them by regularly monitoring your performance against your goal. Its features include a free app, sports monitor, sleep tracker, smart alarm and clock. Improve your health at the touch of a button. Its Lightweight and discreet and also features time and date which is set by simply connecting to your smart device. Activ features 2 alarms from sports alert to gentle wake up. Wireless connectivity. Lightweight and discreet. Slim fashionable design. Sleep monitor. Connectivity MB memory. Multi-platform operating system. Bluetooth 4 connection. USB 2 connection. Display information 21.8mm AMOLED screen. Battery 35mAh battery capacity. Typical usage time of up to 5 days. Low usage time of up to 5 days. 3 hour charge. Physical specification Size: one size. Watch size H30, W10, D9mm. Strap size L230, W10, T2mm. Weight 25g. Features Water resistant. Dust resistant. Pedometer. Distance. Accelerometer. Calories. Sleep. Accessories included: USB charger Cable, including charger.