This easy-to-use push button allows a user to perform a calm, effective and confident action when needed. The multipurpose pneumatic Stopper Station push button covers a wide range of applications. Pneumatic button opens or closes a circuit and has a timed delay before reset and does not require electricity to operate. Button offered in six colors, several button activation choices, with or without a protective cover and in any language to accommodate most applications. ADA Compliant, UL recognized component UL508.