Blue Ear Bluetooth Beanie Hat combine beanie hat and bluetooth device together, design with high quality Warm Arylic Materia, double knitted, warm your head and heart in the cool season, design with the latest V5.0 Bluetooth Chips and stereo speaker,great sound go through your ear,200mAh rechargable battery can support your 8 hours music playing and phone talking time. Perfect for outdoor snowboarding skating running hiking,workout in winter season. Great gifts for Christmas.