Dapol 7L-005-101 BR Ground Signal Single Twin Disc - O Gauge

As with all the other servo actuated signals come with almost everything you need to set them up in the box, all you need to really do is hook up an appropriate power supply. For the modeler who really doesn't like soldering there is a 2m plug and play extension cable (4A-000-014) available to help reach between the signal and your control center.