Feature
1. Knitted material, fashion and keep warm with answer the phone in winter
2.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
3.Set-in Li-ion chargeable battery, charge via USB Cable, long stand-by time.
 
Specifications
1.Bluetooth Version: V3.0 EDR
2.Frequency: 2.4026GHz-2.480GHz
3.Transmission distance: 30ft or so
4.Transmission distance of MIC: ≤3 ft
5.Li-ion Battery:3.7V/120mA
6.Charging time:2.5 HRS
7.Standby time: 60 Hrs
8.Continuous working time: about 5Hrs
9.Bluetooth name: BT-03S
10.Size: Fits for head circumference 56-62cm
11.Speakers can be taken off so that you can wash the hat