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.
The SpectrAlert Advance RFPW is a 9.5" x 7" white retrofit plate that covers the footprint of the legacy SpectrAlert wall-mount speaker strobe. Compatible with horn strobe and speaker strobe line.