Check the listing for details. NEW Photosensitive resistance relay control module/light-operated switch DC 12V. Condition: New. Listed at 4.72 USD. Product Description aFunctional features 1, using photosensitive resistance induction light intensity, bring their ownAuthentic quality relayThat can control the ac or dc load directly. Normally open interface maximum load capacity: communication0 v - 250 v / 10 a, dc0 v, 30 v / 10 a; 2, can be adjusted through the potentiometer sensitivity, by adjusting the potentiometer, set the start relay valve value, when the dark at the threshold, module, relay or absorption, light on the threshold, the relay release; Intelligent control design, after the relay operation, automatic threshold, solves the problems of critical value repeated action; 4, modules, with functions of meter, the reverse power will not damage the module;.