high quality headphone, especially used with computer and language  laboratory system

ear muff headphone

Stereo headband computer headphone with microphone

Technical indexes:

Earphone:

1) Impedance: 2 x 8, 2 x 16, 2 x 32, 2 x 40

2) Sensitivity: 110±3dB

3) Frequency range: 20 - 20,000Hz

4) Rated power: 2 x 100mW

Microphone

1) Impedance: 1,800, 100, 200

2) Sensitivity: -48±3dB

3) Directivity: omnidirectional

4) Frequency response: 30 - 16,000Hz