From the home office to the busy contact center, discerning professionals have rated the Inspire Monaural headset as the proven leader in durability, audio quality and comfort. Be heard in your best form with superior stereo transmit. This headset is a true pro, designed to withstand heavy use while exceeding your standards of all-day comfort. Adjustable headband for precision fit Noise Canceling microphone Infinitely adjustable boom for perfect microphone placement Quick disconnect allows you to leave your phone without removing your headset This headset meant for telephones that do not requre an amplifier. RJ-14 Connector.