Plantronics blackwire c720 m
Stereo pc headset usb headset design on ear type dynamic transmission mode cable types of connection usb usb 20 type of cable single sided operating time 10 h sound mode 20 hardware type of headphones headband features adjustable headband volume control intergrated sound card functions mute rechargeable microphone properties noise cancelling microphone rotating microphone included in delivery user manual usb cable series plantronics blackwire