FMM-101 is a miniature monitor module (a mere 1.3" (3.302 cm) H x 2.75" (6.985 cm) W x 0.5" (1.270 cm) D) used to supervise a 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.