https://www.dsppatech.com/product/dsp3354en10w-en54-fireproof-ceiling-speaker.html DSP3354EN 10W EN54 Fireproof Ceiling Speaker Features: ● Built-in 100v transformer ● Wall mount type loudspeaker ● Rate power 10W with optional power taps ● Material: painted steel ● Leaded wire case and ceramic terminals for fireproofing ● Comply with EN54-24 requirements Introduction The on-wall loudspeaker DSP3354EN is specifically designed to meet the requirements of EN54-24 that is part of a series of norms concerning voice alarm evacuation in case of fire.