The NVS-EN6MCS is an EN54-24 certified commercial fireproof ceiling speaker with a transformer, designed for voice alarm and PA systems in schools, offices, hotels, and airports. It meets the EN54-24 EVAC standard and features a ceramic connector, fire dome rated for 95℃, and selectable power outputs of 6W, 3W, 1.5W, and 0.75W. The speaker is equipped with a 5.25″ full-range unit, supports 100V or 70V line input, and has a metal enclosure, white metal grille, and red fire dome. Installation is quick and easy with the included spring clip for in-ceiling mounting.