The KEY-SMART consists of two conductive layers separated by an insulating layer with two wires which are connected to an external relay or after-market device where continuity is controlled by an after-market remote-starter. Controlling the continuity allows the remote-starter to control the Key-Fob or Smart-Keys power circuit which effectively controls its RF transmission. Installation only takes a few seconds and does not require any modification or soldering within the key-fob/smart-key allowing it to be returned to its original condition and allowing the membrane to be re-used several times.