The Shure 450 Series II is an omnidirectional, desktop mounted paging microphone with a locking push-to-talk switch. The microphone is designed with for basic paging applications in schools, commercial offices, warehouses, retail, etc. The exterior is made of a tough, high-impact material for rigorous use in industrial and commercial applications. The omnidirectional element is optimized for speech and the coiled cable provides four conductor lead wires for connecting the microphone and switching relay.