Plantronics supraplus digital dw251n
Headband headset series plantronics supraplus transmission mode cable sound mode mono type of headphones headband material plastic earcup material foam headphone transmission range 100 4000 hz microphone frequency range 200 4000 hz microphone sensitivity 49 dbmw headphone impedance 150 ohm microphone impedance 1 500 ohm type of fitting on ear manufacturer specific features quick disconnect