Good deal for refurbished:) Normally 70 bucks.

Headset:

Speakers: 50mm diameter speakers with neodymium magnets
Frequency Response: 20Hz – 20kHz, >120dB SPL @ 1kHz
Condenser Microphone Frequency Response: 50Hz – 15kHz
Audio mute: Audio mutes automatically when carrier signal is lost
Battery: Operates on dual AAA batteries (not included)
Shut down: Automatic shut down after approx 5 minutes of carrier loss or silence to conserve battery power