This M2 smart bracelet watch is very comfortable on the hand. It is made up of plastic and metal in parts. It is waterproof up to IP67 and uses Bluetooth for mobile connection. It supports both, Android and iOS. It can record all our activities like the steps, mileage, calories, heart rate, pedometer etc. The battery capacity is of 70mAh. It has a sleep monitor and a sedentary reminder too. The rectangular OLED display is wide enough. There are SMS notifications. It is resistant to abrasion, sweat, sebum etc. It comes with a one-year replacement warranty.