Marketplace
The RRP for this says $89.94, and today it is for $39.94. I haven't used this myself and am buying one.
The specs are:
The Frequency range of the Earphone is 20-20kHz
The Frequency range of the Microphone is30-16kHz
Impedance is 32ohm
Speaker Diameter is 40mm
This is basically becoming their regular price at DSE
they are on sale more than not