... for any access control system (reader, exit button, intercom); 180FA installation way is flushing concealed way,pls noted. ... Current Draw: 12V/300mA; 24V/150mASuitable for: Wooden door, Glass door, Metal door, fireproof doorFinishes for Shell: Anodized aluminum & surface texture ... access control system (reader, exit button, intercom);Easy to install, no frame door can choose bracket to use;With dual ...