7   +   4   =  

Redmi’s first fitness tracker is called the Redmi Band and is priced at just 99 yuan ($14). The fitness tracker comes with a 1.08-inch color display and is claimed to provide up to 14 days of battery life.

Source: Redmi Band is a sub-$15 fitness tracker with a 1.08″ color display, 14-day battery life | Android Central