The T-710A 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 5” full range speaker driver is designed of wide frequency response 300-18kHz, the multiple power taps 15W & 30W are helpful for different applications varies from room size and ambient noise surroundings. The ABS enclosure and metal bracket are of gray 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.