language Learning system headset.

1. Good looking and wearing comfort2. Excellent sound effect, clear sound quality

3. Stable and durable

4.line volume control operation

Specification

Headphone :

Sensitivity≥108dB at 1KHz, 1mW

Frequency Response20 to 20,000Hz

Impedance81632 ohm

Microphone :

Sensitivity-45dB±2dB at 1KHz, 1V/Pa

Frequency Response200 to 5,000Hz

Impedance2200 ohm

Cable length1.8m

HL-860 Language lab headset