Brand System Sensor
Model M500DM

Check the listing for details. "System Sensor M500DM Intelligent Dual Input Monitor – Pulled, Untested, As-Is". Condition: For parts or not working. Listed at 35.00 USD. "Pulled from decommissioned system – untested, no guarantees" "Visually good condition, no obvious damage (add photos of both sides, terminals, address dials)" "Sold as-is, no returns – great for parts, repair, or if you can test/program it

$21.00
$35.00