The CM-45-154SE1 from Camden Door Controls is a 4.5" square push plate switch (concealed screws) with sounder, illuminated red/green/blue surface mount CM-54i box, 'BLANK' faceplate, double sided. Door locked when red, unlocked when green and occupied when red, vacant when green. Camden Door Controls CM-45 Series all-active switches are heavy-duty, ADA-compliant door controls. The 4.5" square faceplates are stainless steel and the assemblies are designed for easy installation.Both series mount to standard single gang or double gang electrical boxes. CM-45 series is sold as a complete assembly, which is mounted to the in-wall box (or surface box) using stainless steel Allen screws and a hex key (included with the switch). Access to the mounting screws is through small holes in the front of the faceplate. This provides for tamper resistance, while maintaining an attractive overall appearance.The rear assembly is mounted to the in-wall box (or surface box). The front faceplate is then screwed to the rear assembly using either standard or security screws (included with kit).The SPDT (and optional DPDT) switches are UL/CSA approved, and rated 15A at 30V DC. The push switches are offered with different graphics, and in various architectural finishes. Weather resistant, and water tight configurations are also available.