As per tweet made by Wang Xiang, Senior Vice President at Xiaomi. Xiaomi had sold 1 million mi band 3 in just 17 days. In order to celebrate this achievement they are giving mi band 3 to 3 lucky contestor commenting on his tweet.
Mi Band 3 have a heart rate sensor, pedometer, and IP68 rated water resistance. It also comes with Bluetooth that will allow it to pair with the mobile device. It can be also be used to check the calls on the phone and has a clock too. There is a rubber strap available with the Mi Band 3 , which the company claims has been tested 2,000 times for buckling on the wrist and removing it, resulting in an intact situation.