Abstract: An electronic access control system is provided including a two dual button self contained sequential code device that can be accommodated in a standard wall box and used in conjunction with a standard toggle switch type wall plate. The device is particularly useful as a disarming mechanism for security systems because of its inconspicuousness. The device comprises an electronic voltage regulator, input circuit network, timing circuit, coding circuit, logic network and output circuit. A condition indicating circuit and tamper circuit are also provided. The logic network preferably comprises an integrated circuit with 9 code inputs and a debouncing circuit arrangement is incorporated in the input network circuit.