Kasstino Warm Beanie Hat Wireless Bluetooth Smart Cap Headphone Headset Speaker Mic DH 100% brand new and high quality Knitted material, fashion and keep warm with answer the phone in winter Set-in MIC, available for cell phone to transmit the speaking phone to your audio devices directly so that the user can hand free answering phone up via the device. Set-in Li-ion chargeable battery, charge via USB Cable, long stand-by time. Speakers can be taken off so that you can wash the hat