GoldWorld Bluetooth V4.1 Wireless Musical Beanie Winter Hat Knit Cap Beanies Unique for Kids Men Women Teen Boys Girls Outdoor Sport Blutooth V4.1 TechnologyOur beanie hat have the latest bluetooth V 4.1 technology. You can quickly connect to your phone, tablet, and other bluetooth enabled music devices, which can reach up to 30 feet wirelessly. Comfortable & WarmThis bluetooth beanie has only one size, but it is elastic so it fits everyone's size.It's a comfortable knit cap, no doubt.Even in the cold winter, it can help you keep warm! Easy to ControlThis winter hat have 3 buttons for controlling:Making/Answering Call,Adjust Volume,Pre/Next Song.Works with any Bluetooth enabled device.enjoy about 5-6 hours of premium quality talk/play time (full charge in around 2 hours), up to 60 hours standby time. Washable & Widely UsedThe beanies audio system is fully removable,so you can wash the funk out of your Beanie hat after those long days of wear you are going to have.It is perfect choice for traveling, waiting for the bus, jogs in the cold or just rocking out in your bedroom! You will look great and keep warm while listening to your favorite songs. 5 Years Warranty 100% risk-free and hassle-free 5 year manufacture warranty.Our customer support team promise the effective,responsive,satisfactory Service.If you have any problem,please feel free to contact us at any time.