Specifications:
1.   Bluetooth Version: V2.1, Chipset: CSR
2.   Transmission distance: 10M
3.   Frequency Response: 20Hz-20KHZ
4.   Talk Time: 12 hours
5.   Standby Time: 150 hours
6.   Bluetooth Sensitivity:-85dB
7.   Build-in speaker mic
8.   Speaker: Ф40mm.
9.   Impedence: 32Ω
10. LINE-IN Plug:Ф3.5mm stereo
Functions:
1, Integrated Bluetooth technology with MP3 music, Allow you to convert Music and Phone calling freely
2, Support Bluetooth stereo device entirely to receive A2DP stereo music.
3, LINE-IN available, which can be used to listen music by connecting to PC;
4, Built-in rechargeable lithiumbattery 300mAH.
5, Foldable style, easy to carry;
6, Ultra-soft padding and lightweight adjustable headband provide extreme comfort for long term wear