Spec Sheet Preview: The Alpha Communications® ES512 Series entrance panel is a compact style series for use with various types of loudspeaker type apartment/suite stations. They are our most economical entrance panel stations for surface mounting, for up to 3 buttons. Panels are equipped with a weather resistant mylar speaker protected by a Dark Brown flame retardant polycarbonate plastic grill. ES512 series panels can be flush or surface mounted, when used with the appropriate back box/housing. These compact panels are 5.00"W (127mm) x 7.00"H (178mm)&nbs …