Musical Beanie and earmuff Bluetooth Hat..the Bluetooth enabled Beanie hat that plays heartwarming music from your phone or other Bluetooth enabled devices and keeps your ears warm too .. The Musical Beanie can even answer phone and lets you make calls using the built in mic. Get a crystal clear sound waves as well as protection from windy weather this winter with this Bluetooth enabled beanie.. Details: Made of Polyester blend that is warm and comfortable to wear. Snug tight over your head and cover the ears too. Volume controls to control your music from the hat. It is Siri compatible for Apple devices and can work with any Bluetooth enabled device. Size: 1 size fits all.