|With metal poles and ladders, these scale signals will look great along your right-of-way. The 3-position flag has a realistic slow motion. The base has optical sensors built-in with a sensitivity adjustment. Just apply power and put them next to the track. These signals do the rest. They have separate inputs and outputs so they can be daisy chained. The down track signal will hold the up track signal on yellow until the down track signal goes off red.|
Picture shows both 1040L(ower) and 1040U(pper).