Audio Range - Headphones:     20 Hz - 22 KHz
Audio Range - Microphone:      90 Hz - 16 KHz
                             Sensitivity:    -59dBV/uBar
Noise canceling microphone:  -30dB (yes, -30dB)

A real featherweight at less than 3 ounces. 

Fatigue?  What fatigue!  Truly enjoyable to wear and no wet ears.
Can be used in either VOX or PTT mode (PTT with footswitch).
The headset cable is approximately 8 ft. long.
Dual earpiece headphones and adjusts easily to fit.
Background noise is still audible to you but not over the air.
Great also for mobile and field day.  I have two in my Go-Pak.

Inexpensive, lightweight and great sounding audio in SSB, FM and AM.
Headset volume control and microphone on-off switch are on the cable. The ON-AIR headset price includes the transceiver adapter.
You can order a different transceiver cable for just $21.00