The PLP 50EN is a wideband ceiling speaker featuring a composite material protection dome designed for recess installation in false ceilings or panels. It is especially suitable for broadcasting alarm messages thanks to a highly intelligible sound reproduction and the flame and heat resistance. The terminal connection boards are made of ceramic material for input and output flameproof cables. A thermal fuse protects the integrity of the line in case of heat affecting the speaker. Ground screw. All the wires inside the speaker feature flameproof leads.