Features: 1. Bluetooth wireless technology offer stablest and strongest connection support music and calling easy and fast to pair with your devices. Built-in Stereo Speakers & Mic enhance your music listening experience. You can remove it to charge by laptop power bank socket car charger etc. 2. Built with easy-access USB charging port simply charge it via the included USD cable. It takes 1-2 hours to get full charged. The battery offers continuous working hours up to 10 hours. Perfect for camping hiking skiing hunting jogging cycling dog walking auto repair etc. 3. This beanie cap is made from ultra-soft and excellent insulation acrylic stretchable material which has great elasticity provides the maximum comfort delicacy and mobility for most versatile lifestyle indoor sports-active outdoor or everyday usage without compromising the convenience. 4. It is hand washable please remove the LED and the headset before washing. 5. BEST gift choice for Thanksgiving Day Christmas Birthday and other special occasion. Specification: Material: Acrylic Size: 19.5*22*2cm (packing) Hat brim: no brim Cap circumference: adult (flexible) Battery capacity: 300mAh Bluetooth protocol: 5.0 Notice: 1.Due to the different monitor and light effect the actual color may be a slightly different from the picture color. 2.Please allow 1-3mm differs due to manual measurement. includes: 1 x Hat "