For installation of low-voltage devices in an existing wall. Thinner rectangular flange for faster easier installation less protrusion on the wall. Shallow bracket means less material easier to work with. Can be installed vertically or horizontally. UL listed. Low Voltage Bracket; Backless; 2 Gang; 4-Inch Length; 3.92-Inch Width; Non-Metallic Material; Orange Color; UL Canada And US Approval.