An ultra-sturdy 46mm solid aluminum case and an ergonomic 22mm silicone band make the ON - MA01-BRR watch comfortable and durable. With its 1.3-inch IPS HD display, it can give you up to three days of usage. The Fundo Health app (available on iOS, Android, and the App Gallery) allows you to make and answer calls and view notifications right from the watch. Track your vitals and movement with its heart rate monitor, sleep monitor, blood pressure, oxygen, ECG, and pedometer functions, as well as multiple sports programs. You can also connect your phone's camera and stream BT music right to the watch.