MoreTeam Soft Warm Beanie Hat Wireless Bluetooth Smart Cap Headphone Headset Speaker Mic 1.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. 2.Knitted material, fashion and keep warm with answer the phone in winter. 3.Set-in Li-ion chargeable battery, charge via USB Cable, long stand-by time. 4.Speakers can be taken off so that you can wash the hat. 5.100% brand new and high quality!