Model No : Sony DR-320DPV PC Headphones

Specifications :

General
Type :  Dynamic, Open Air
Driver Unit :  30mm, Dome Type
Sensitivity  : 100dB/mW
Power Handling Capacity :  1,000mW
Impedance :  24 ohms at 1kHz
Frequency Response :  14 - 22,000Hz
Cord Length :  Approx. 2.5m
Plug :  Gold-Plated Stereo Mini Plug (For Headphone Plug), Gold-Plated Mini Plug (For Microphone Plug)
Weight (without Cord) :  Approx. 110g
Supplied Accessories :  Detachable voice tube x 1

Microphone
Unit/Type :  Electret Condenser
Frequency Range :  20 - 10,000Hz