The Apart built-in ceiling speaker made of powder coated steel (RAL 9010 equivalent), equipped with a high efficiency full range speaker and a multi tap 100 volt transformer, all certified according EN 54-24. The unit is equipped with a ceramic speaker line connector block, thermal fuse and a metal fire dome. The installation of this speaker is easy thanks to the spring loaded clamps and the included PG16 cable gland. The speaker with its excellent intelligibility is a perfect budget oriented solution for background music, paging and evacuation systems messages.