Federal Signals 2012 Series Back-up Alarms are designed to provide fleets in the municipal, construction and general work truck market with an affordable and consistently reliable solution for back-up safety. These epoxy-encapsulated, 12-24 VDC alarms provide rugged, industry-standard features at an economical price. Steam-cleanable and pressure-washable, and built with a heat-resistant, glass-filled nylon, these alarms can handle the toughest commercial and industrial work sites.