FMM-1 is a standard-sized module (typically mounts to a 4" [10.16 cm] square box) that supervises either a Class A (Style D) or Class B (Style B) circuit of dry-contact input devices.
HN-PWP12A/ is a 12W cabinet loudspeaker typically used for general public address applications such as shopping malls, supermarkets, educational institutes, office buildings, hotels, and restaurants.