The Astatic 878HL Desktop Microphone is intended for use with commercial paging systems in schools, restaurants, warehouses, medical facilities, etc. The microphoe is built tough and features an omnidirectional pickup pattern for a generous, forgiving audio pickup area. A programmable, push-to-talk and lift-to-talk switch is provided and flexible output impedance makes the 878HL flexible for use with most paging systems and amplifiers. The 878HL is supplied with 2.1m (7 ft.) of four-conductor, two-shielded cable, wired normally-open for relay control.