Bluetooth Talking Keep Warm Music Speaker Knitted Hat for Mobile Phone (Black) 100% brand new and high quality. Set-in Li-ion chargeable battery, charge via USB Cable, long stand-by time. Knitted material, fashion and keep warm with answer the phone in winter V3.0+EDR Bluetooth version,available for most of devices with bluetooth function. 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