Features:100% brand new and high qualitySet-in MIC， available for cell phone to transmit the speaking phone to your audio devices diretly so that the user can hand free answering phone up via the device.Set-in Li-ion chargeable battery， charge via USB Cable; With Built-in Removable headphones which can be pulled out from the hat if you would like to wash the hat!Specifications: Bluetooth Version: V3.0+EDRFrequency: 2.402GHz-2.480GHzTransmission distance: 10M or soTransmission distance of MIC: Less than 1MLi-ion Battery:3.7V/100mACharging time:2 HRSStandby time:60 Hrs or soContinuous working time: about 3.5HrsBluetooth name: Magic HatHeadband Size: 45*6.5cmColors: Dark gray， Black， Light grayPackage includes:1 x Bluetooth Music Headband1 x USB Charging cable