The T-104U is a ceiling speaker built-in 70/100V transformer. The 70/100V transformer technique reduces line losses on longer distance and allows easy parallel connection of multiple loudspeakers. The built-in 4-inch speaker driver is designed of wide frequency response 100Hz to 15kHz, the multiple power taps 1, 2 and 3W are helpful for different applications varies from room size and ambient noise surroundings. The metal grille and ABS baffle are painted in attractive white color. Its spring clamp makes the easy and secure installation. It is ideal choice for industrial and commercial applications in hotel, school, office and factory where background music and paging is needed.