1.【LATEST BLUETOOTH 】With the Bluetooth , this musical headband will simply sync to cell phones, tablets and other Bluetooth enabled devices in seconds. 2.【SPORTS HEADBAND AND 】Sports headband allows you to listen to music without having to wear additional headphones when you are running, yoga, playing games, workout and so on. Built-in speaker and Microphone won't let you miss any call, and knitted material protects you from being disturbed by your mess hair and sweat, is also very comfortable for sleeping 3.【LONG-LASTING ENJOYMENT OF MUSIC】200mAh USB rechargeable battery has a charging time of 2 hours, 48 hours of standby time and 8 hours of music playing time (maximum sound), bringing you lasting music enjoyment 4.【DETACHABLE AND WASHABLE】There is a small opening next to each of the two speakers and the bluetooth module, it is easy to remove out the speakers & bluetooth module and wash it for the next time's using 5.【COMFORTABLE SLEEPING HEADBAND】The sport headband is made of soft material, and has elasticity, headband circumference , which is the general size fits to most people and it won't slip off when you exercise, is also a good gift for your family, friends and lover