The featherlight TriMount Convertible headset allows you total control of the wearing style. Detach the lightweight headband and opt for the ear hook or ear loop option. Weighing in at just 6 grams this headset is the perfect choice for the office professional who demands comfort and versatility. Detachable headband Four sizes of ear loops included Ear hook option included Noise Canceling Microphone Adjustable boom Can be worn on either ear Quick disconnect --leave your phone without removing your headset This headset meant for telephones that do not requre an amplifier. RJ-14 connector.