Review: Uk barrier matches the description. works without load. customization direct beam made by the brightness of yellow LEDs on the IR receiver. at the intersection line beam led red IR receiver and click the switch. but when you connect the multimeter falls IR receiver and can not be traced operation system relay. I hope I do something wrong, so my research will continue. what is minus 1 star for the lack of instructions and the appearance in work. in the way of posting 25 days. the track is not monitored.