[sleep monitor] it can tracker with your sleep ,to help you know more about your sleep and health condition
[step count and tracker with the calorie consumption] when you are walking or running ,it can count steps and track with the calorie consumption
[Silent alarm clock] if you set an alarm , it can remind you by vibration mode
[Charge with any USB spot] it can charge with any USB spot ,and one full charge it can keep working 15-20 days
[waterproof] these activity trackers are waterproof, you do not need to worry when you wash your face or swim or rainy day.