Happy-top Bluetooth Music Soft Warm Beanie Hat Cap Stereo Headphone Headset Speaker Wireless Mic Hands-Free Men Women Gift (Black) Elastic Knitted MaterialThis wireless music beanie with stretchable high quality knit material to fit all sizes and shapes,keep your head warm and allows you to listen to music without additional headphones, the wireless stereo headset of wireless music hat brings you great sound quality,perfect for outdoor sports, running, skiing, skating, hiking, camping, dog walking, holiday travelling and so on. Wireless V4.2 TechnologyThis wireless music hat is very simple and fast connect up to 2 smartphones, tablets and other wireless enabled music devices wireless range up to 33 feet (10 meters), the wireless stereo headset brings you great sound quality, style and comfort. USB Rechargeable Wireless beanie hat Built in 180mAh rechargeable lithium-ion battery which is charing by Micro USB cable(included). Charging hours: 2 Hours, Working Time: about 6 hours, Standby hours:180 hours.The battery board has a charging protection for the battery and can work while charging.(The red light will be on when charging, blue light when fully charged). Built-in Microphone & HandsfreeThe simple 3-button Panel built-in stereo speaker and microphone, you can answer phone call & call last dialed number. The wireless musical knit cap built-in microphone with echo and noise canceling ensures crystal clear sound enable you to listen to your favorite music via wireless streaming in great sound quality. Fully Washablewireless device can be taken off from the hat, then you can wash the hat.The icon panel on the hat is not fixed to the buttons. If you find the icons do not match the control buttons, please manually adjust them.