FZM-1 is a standard-sized module used to monitor and supervise compatible two-wire, 24 volt, smoke detectors on a Class A (Style D) or Class B (Style B) circuit.
Offering power ratings of 10W (L-PJM10A) and 20W (L-PJM20A), these two speakers are very popular for both outdoor and indoor use. They both come with a fire-resistant cable and boast sturdy aluminium