Features:
V3.0 + EDR Bluetooth version, avaliable for most of devices with bluetooth function.
Knitted material and handsfree speaker that protects the head from the cold winter
The hat can be washed
Set-in MIC, available for cell phone to transmit the speaking phone to your aduio devices
directly so that the user can hands free answering phone viea the device
Allow you to listen to music and talk while doing variety of other activities.
Built-in Li-ion rechageable battery,charge via USB cable, long stand-by time
Supply power display on Phone

Speficications:
Bluetooth: V3.0 + EDR
Frequency:2.402GHz-2.480GHz
Transmission distance:10M or so
Transmission distance of MIC: less or equal 1m
Li-ion battery: 3.7V/100mA
Charging time: 2 hours
Stand-by time: 60 hours or so
Continuous talking time: about 3.5 hours
Hat Size: One size fits most, approx 26 * 22cm (elastic)
Color: Black & gray
Material: polyester
Net weight: 138g

Package Contents:
1 * Bluetooth music hat
1 * User manual
1 * USB cable