TH-423  

Back- Wear Type Headset for Tele- communications.

Receiver：150Ω 30mW 112dB 300Hz- 4KHz
Microphone：-62dB [ 2V, 2.2KΩ ]0dB=1V/ µbar, 1KHz
Cable：180CM coiled cable with 4P4C plug
Weight:：70g