Product Specification:
<br />1. Bluetooth version: 4.0
<br />2. Operation distance: about 10 m
<br />3. Operating Frequency: 2.4 - 2.4835 GHz
<br />4. Speakers:  40 mm
<br />5. Sensitivity: 115dB S.P.L at1KHz
<br />6. Impedance: 32  
<br />7. Frequency Response: 20Hz - 20000Hz
<br />8. Rated Power: 40mW
<br />9. Power Capability: 100mW
<br />10. Cable length: about 1.5 m ± 0.03 m 
<br />11. Plug Type:  3.5 mm Stereo
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<br />Package Included:
<br />1. 1 * Headset
<br />2. 1 * USB
<br />3. 1 * 3.5 MM Audio Jack
<br />4. 1 x  User Manual