The Extron SMB 112 is a two-gang surface mount box designed for professional AV installations where in-wall mounting is not feasible or desired. This durable enclosure provides a secure and organized housing for mounting various Extron and standard electrical devices, such as wall plate connectors, volume controls, keypads, or small electronic modules, directly onto a wall surface. Its two-gang capacity offers flexibility to combine multiple interface types—for example, an HDMI input, a volume knob, and an RJ-45 data port—into a single, clean unit. The box is constructed from high-impact polycarbonate or steel, ensuring strength and durability in commercial environments like classrooms, conference rooms, and retail spaces.

Installation is straightforward: the box is attached to the wall using screws through its backplate, and the desired wall plate is then secured to the front of the box. The SMB 112 features a low-profile design that minimizes protrusion from the wall while providing ample internal depth for cable termination and management. Knockouts on the sides and back allow for flexible cable entry, and the box often includes mounting bosses that align with Extron's specific wall plate screw patterns. This surface-mount approach is ideal for retrofit projects, concrete or glass walls, or temporary installations where cutting into the wall is impractical or prohibited.

The Extron SMB 112 exemplifies a focus on installation flexibility and professional finish. It enables system integrators to deploy user interfaces and connectivity points exactly where they are needed, regardless of wall construction. By providing a robust, standardized enclosure, it ensures that wall-mounted AV components are securely housed and easily serviceable, contributing to a reliable and aesthetically pleasing installation.