Entry and exit loops, which happen to be buried wires connected to a special machine inside your gate operator that acts to be a change to open or shut your gate AutoGate Northern Ireland www.ElectricGatesNewry.com 07855-781433 02830-886666 Contact Adrian for help, advice or information on Electric Gate Installation or https://claytonqnlkg.blogs100.com/28469933/are-you-looking-sliding-gate-repairs-near-me-call-now-adrian-on-07855-781433-for-help-and-advice-about-automatic-gates