The T-105H is a surface mount 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 5-inch speaker driver is designed of wide frequency response 110 to 13kHz, power output is 3 watts. The metal grille, ABS baffle and ABS back cover are in attractive white color. The surface mount type is designed for some special application where cutting hole in roof is impossible, so the speaker needs to be directly mounted to the surface of the roof or wall. It is ideal choice for industrial and commercial applications in hotel, school, office and factory where background music and paging is needed.