Bluetooth 5.0 wireless technology offer good connection, support music and calling, easy and fast to pair with your devices. Built with easy-access USB charging port, simply charge it via the included USD cable. Made from -soft insulation acrylic, has great elasticity, provides the maximum comfort, delicacy, and mobility. Hands-free LED light is rechargeable and removable, no longer waste your money on batteries. You can remove it to charge by laptop, power bank, socket, car charger, etc. Perfect for camping, hiking, skiing, hunting, jogging, cycling, dog walking, auto repair, etc. : It is hand washable, please remove the LED and the headset before washing. Specification: Material: Acrylic Head Circumference: 40-60cm Gender: Unisex Bluetooth: V5.0 Package Includes: 1 Piece Winter Music Hat : Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.