it can serve as a bluetooth earphone when the host is parted. and it can provide more reliable connecting performance while guaranteeing sound quality. with six-axis sensor placed within and self-developed new motion algorithms of technology, can not only accurately record and show user motion information like step number, calorie and distance, but also sleeping duration and sleeping situations as well. It has rich functions, covering various life scenes, such as doing sports, driving, relaxing and working, It is a good helper in your life.