CruzPro LA-20B Alarm Sounder

The LA-20 is an External Alarm has connects up to five
instruments to provide an amazing loud 105 dB alarm volume that can
be heard for 1/4 mile or more. A built-in light flashing circuit
will flash spreader, running or anchor lights drawing up to 8
amps.

All five inputs terminate on screw terminals making connections
easy and require only a screwdriver. Four of the five alarms can be
silenced by pressing the RESET button, one purposely bypasses the
RESET button and must be turned off at the source (good for
security alarms).

Two different types of inputs are provided. Three inputs
activate the alarm if any one of them are grounded or go below 5
VDC. The other two inputs activate the alarm if one of them goes
high (+2 to + 33 VDC).

If the LA-20 is silenced by pressing the RESET button, it
automatically re-arms itself when all the inputs are in a clear
state.