Comfortable hands free corded phone headset for office, contact centers, include quick disconnect RJ9 headset adapter & extra 3.5mm smartphone adapter. Over-the-head Monaural and Binaural versions. The headset can be worn on both ears. Noise cancelling headphones to reduce back ground noise. | 330 degree rotatable flexible noise cancelling microphone headset boom to be positioned for optimal comfort and voice transmission. Durable Noise reduction office VoIP phone headsets for office phones use at call center office telemarketing and noisy situation. Improve productivity, easy wear lightweight comfortable. | Fit any headset size. Adjust the headband until comfortable, a single ear headset you should set the T-bar above your other ear. Lapel clip for optimum level what you want. Replaceable big soft foam ear cushion (one more leatherette) for optimal. | Professional phone headset: Monaural headset for those who prefer to leave one ear open, ideal for Call Center Service, Telephone Counseling Services, Insurance, Hospitals, Banks ect. | COMPATIBLE with most Polycom Mitel Plantronics etc telephone models that listed in Product Description, Or contact us for more compatibility guidance. 45 days money-back guarantee and 24 months warranty.