bong is a global leader in intelligent bracelet brands. bong can accurately track the movement of state that can be automatically identified nine exercises throughout the day, have one-year battery life, and is the first intelligent bracelet which can detect swimming movement automatically. During the day, bong record calories burned and open its active incentive mode. At night, it monitors sleep quality and provide you sleep recommendations. bong is better you. At the same time, bong guarantees IP67 waterproof rating, whether bathing or swimming is not necessary to take off. The overall weight is only 14 g, wearing no sense of weight.