The CT-A1 Sounder is an indoor sounder that installs in a single-gang electric box. Works in
conjunction with both CT-2B and CF-2C control units.
Three Buttons On Plate interact with lights and sensor when used with the CF-2C control unit:
MANUAL ON: Puts lights on timer
RESET: Turns lights off if they have not timed out
EXIT DELAY: Turns sensor probe off so car can pass by and not trip the system (if late p.m. or early a.m.)
(Note: these three buttons are non-functional when used with the CT-2B control unit.)