The T-103D is a water-resistant ceiling 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 4” water-resistant speaker driver is designed of wide frequency response 150-18kHz, the multiple power taps 3W & 6W are helpful for different applications varies from room size and ambient noise surroundings. The metal grille, ABS baffle and ABS back cover are paint in attractive RAL9016 white color. Its spring clamp makes the easy and secure installation.