Knitted material, fashion and keep warm with the answer the phone in winter.
Set-in MIC, available for the 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 charges via USB Cable, long standby time.
Bluetooth Version: V3.0+EDR
Transmission distance: 30 ft or so
Transmission distance of MIC: ≤3 ft
Charging time:2.5 HRS
Standby time:60 Hrs
Continuous working time: about 5Hrs
Size: Fits for head circumference 56-62cm
Speakers can be taken off so that you can wash the hat