Best-electric Bluetooth Hat Music Hat Knitted Winter Hat Magic Hat Women/Men Winter and Spring Warm Hats Hands-free Music mp3 Speaker Hat Beanie Hat for Smartphones (Black) Perfect for outdoor sports running skiing skating hiking working dog walking out holiday travelling and so on Perfect for spring,fall, winter, jogging in the cold or just rocking out, keep warm while listening to music. V3.0+EDR Bluetooth version, with the design of built-in stereo removable speakers, capable of delivering amazing music. So can enjoy music everywhere any time. Experience wireless freedom when listening to music or taking calls while jogging, running, skiing or doing various activities. Knitted material ,fashion and keep warm when answering the phone in winter. And washable.