LHM 0606/xx is an economical and efficient universal 6 W ceiling speaker. Model /00 is screwed to the ceiling, and model /10 is clamped to the ceiling. Optional flameproof cover LBC 3080/01 basic function this is an economical embedded smallpox speaker, suitable for all kinds of common applications. This full-range loudspeaker is suitable for broadcasting voice and music in stores, department stores, schools, offices, sports fields, hotels and restaurants. The speaker assembly consists of a 6 W speaker with a speaker and a frame with a 100 V matching transformer on the back. A circular metal mask is also integrated into the front. The delicate design and neutral white coating make the speakers perfect for any indoor fit. All Bosch speakers are certified to meet IEC 268-5 power handling capacity (PHC) standards and can operate continuously for 100 hours at rated power. Bosch has also conducted simulated acoustic feedback exposure tests to ensure they can withstand twice the rated power in a short period of time. This ensures high reliability of the speaker under extreme conditions, improves customer satisfaction, extends service life, and significantly reduces the probability of failure or performance degradation. Installation/configuration of speaker assemblies in safe accordance with EN 60065 standard can be quickly and easily installed into mounting holes in the ceiling. Model /00 is fixed with three attached white screws. The /10 is fixed by two spring-loaded integral ceiling clamps. The circular form attached to the loudspeaker is used to mark the mounting hole with a diameter of 165 mm. Three wires are drawn from the matching transformer (primary winding), allowing the user to select the rated full power, one half power, or one quarter power. In the event of a fire, the flame will spread throughout the building through a speaker hole in the ceiling. To prevent the flame from penetrating the mounting hole through the loudspeaker, the ceiling speaker can be fitted with a steel fire shield (LBC 3080/01). This optional part of the flameproof cover can be installed on the speaker assembly using the standard four self tapping screws. There are four holes in the cover: two (2) for the rubber seal plug (attached) and two (2) for the cable seal plug (PG13).