The SHURE's 450 SERIESII is an omnidirectional paging microphone with a lockable push-to-talk button that may be installed on a desk. The microphone is intended for simple paging applications in schools, businesses, warehouses, and retail stores, among other places. The outside is comprised of a strong, high-impact material that can withstand the rigours of industrial and commercial use. The omnidirectional element is designed for speech, and the coiled cable has four conductor lead wires that link the microphone to the switching relay.