Plantronics entera usb hw121n usb m
Headband headset series plantronics entera transmission mode cable sound mode stereo type of headphones headband type of connection usb 20 suitable for pc laptop features microphone noise reduction volume control adjustable headband in line control material plastic headphone transmission range 20 20000 hz microphone frequency range 100 8000 hz colour black call functions end call muting answer call type of fitting on ear manufacturer specifi