Speaker:
                Driver unit:40mm
                sensitivity: 116dB+/-3%dB
                Impedance: 32 ohm
                Frequency response:20Hz-20000kHz
                Maximum Power Input:20mW
Microphone:
                Driver unit:6*5mm
                sensivity:54dB+/-3dB
                Impedance:2.2k Ohm
                Wire length:2m+/-10%

material:plastic
Anti-bending PVC headband(flexible style)
Adjustable microphone 
leahter headset cap
color headset unit surface.
Strong PVC cable
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