The Valcom V-1038 30 Watt One-Way High Efficiency Horn is a self-contained 30-Watt paging systems that incorporates a built-in 30 Watt amplifier, volume control and and a high efficiency horn. The V-1038 is typically used with a Valcom page control and can expand the capability of telephone systems which have limited paging capabilities. The V-1038 can be used indoor/outdoor.