The T-104C is a fireproof 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 110Hz to 13kHz, the multiple power taps 3 and 6W are helpful for different applications varies from room size and ambient noise surroundings. The metal enclosure, aluminum grille with fire dome all are painted in attractive white color and fire dome metal can is supplied. 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 voice alarm system is needed. Fireproof design features of this speaker include ceramic terminal, thermal fuse, metal back can and fire-resistant cable.