The T-710D is a waterproof horn speaker built-in 70v/100v transformer. The 70v/100v transformer technique reduces line losses on longer distance and allows easy parallel connection of multiple loudspeakers. The built-in horn speaker driver is designed of wide frequency response 350 to 7kHz, the rated power output 20W could meet different applications varies from room size and ambient noise surroundings. The ABS enclosure and ABS bracket are of white color. Easy and secure wall mount installation through the supplied mounting bracket. It is ideal choice for industrial and commercial applications in the outdoor area of train station, shopping mall, parking area and factory where background music and paging is needed.