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.