The TF-700 is a fireproof wall mount 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 100 to 16kHz, the multiple power taps 0.75W, 1.5W, 3W and 6W are helpful for different applications varies from room size and ambient noise surroundings. The metal grille and metal back can plus ceramic connector, thermal fuse and fire-resistant cable, all of the above features make it is fireproof. Its wall mount type makes the easy and secure installation. This fireproof wall mount speaker is specially designed for fire alarm and voice evacuation system, which is designed and manufactured according to EN54-24 standard. It is ideal choice for industrial and commercial applications in hotel, school, office and factory where background music and paging is needed.