System Sensor SA-WBB Wall-Mount Weatherproof Back Box (Red) METAL 27/11 Auxiliary relays are provided for

Auxiliary relays are provided for fan shut down

Allows for reliable filtered and regulated power to be installed where needed

square electrical box and for surface mounting to 4 in

The InnovairFlex D4120W watertight 4-wire photoelectric duct smoke detector is UL listed as a watertight enclosure providing protection against falling dirt

System Sensor SA-WBB Wall-Mount Weatherproof Back Box (Red) METAL 27/11 Auxiliary relays are provided forSpectrAlert Advance Outdoor Back Boxes ensure a NEMA 4X weatherproof listing for AV devices. In locations where you have a hard surface to mount to, Surface Mount Back boxes are the best solution. If you have an exposed junction box, the Back Box Skirts offer an attractive solution to mask the junction box exposure. Retrofit Plates cover paint outlines on the wall when replacing legacy SpectrAlert Advance products.