Entry and exit loops, which happen to be buried wires linked to a special product as part of your gate operator that acts to be a change to open or close your gate AutoGate Northern Ireland www.ElectricGatesNewry.com 07855-781433 02830-886666 Contact Adrian for help, advice or information on Electric Gate https://cristianfthrg.bloginder.com/28423478/are-you-searching-for-sliding-gates-near-me-why-not-adrian-on-07855-781433-professional-reliable-help-for-automating-new-or-existing-gates