(1) appearance
On the basis of B2, B3 optimized and improved the size and weight of the product, making it lighter and more fashionable, and added the style of the metal wristband.
(2) Function
Compared with B2, B3 adds the function of counting climbing steps; By adding an ambient light sensor, the screen brightness can be dynamically adjusted; A capacitance sensor is added, so that the wearing condition of the bracelet can be judged more accurately; Added the function of micro phone book, which can save some common contacts in the bracelet and make calls directly through the bracelet.