an elongate piezoelectric plastic is embodied in a flexible casement to serve as a switching element for electrically motivated apparatus especially as used by disabled persons . the ends of the switch are adhered to portions of a human body that may be moved relatively to each other for activation . the plastic piezoelectric element is of a particular compound nature to enhance signal strength and of a particular configuration to prevent noise and shorting at the peripheral edges . ancillary electrical circuitry enhances signal strength , logically evaluates multiple signals and annunciates those signals audibly or electrically for relay activated switching of other devices .