ADDASOUND Crystal 2801 Monaural Headset

Noise cancelling microphone filters out ambient noise and highlights your voice 150-6800Hz wideband audio processing ensures natural sound transmission 112dB maximum volume control protects your hearing under intensive usage Two types of easily replaceable ear cushions to choose from: Soft leatherette cushions protect skin around ear Light porous foam cushions let your ears breathe Adjustable to the specific habits of every user: U-shaped headband 180 degree horizontal adjustable ear cap 270 degree rotatable/bendable boom Ultra lightweight design for maximum wearing comforts  Does not include bottom cord, that is a separate purchase.  Can use with any Plantronics QD compatible cords PRODUCT BROCHURE