The high performance Plantronics Encore H91N Monaural Headset with Noise Canceling Microphone is a top-of-the-line headset that offers all-day comfort and premium sound quality, owing its performance to Plantronics' unique Sound Enhancement System. A tone control switch lets you select the level of bass and treble that you prefer for a full, rich sound.

Features:  

• Single earpiece headband style 
• Noise-canceling microphone
• Adjustable
• Soft ear cushions for all-day comfort
• Flexible boom
• Tone control
• Single earpiece headband style
• Noise-canceling microphone improves clarity
• Soft ear cushions and tone control
• Lightweight phone headpiece with superior sound and comfortable fit
• Over-the-head design for extended-wear use
• Quick disconnect feature lets the user walk away while wearing headset

Product Model Number: H91N
Dimensions:  8.25 x 6.9 x 2.5 inches