Halco's cold & wet location exit signs have a compact and decorative polycarbonate waterproof design. The plastic enclosure has 5VA flame retardant and UV resistance, stainless steel screws for corrosion resistance. They have single or double face configuration with 6in letters. They can be wall mounted, ceiling mounted or side mounted and have a universal J-box mounting pattern on the back side. The maintenance free Ni-cad backup life safety light is good for 90+ mins after a 24 hour charge and the unit has a test switch and battery charging indicator. (Re-charge battery if stored for more than 9 months. These exit signs contain a heater pad for operation between -25C to 50C in wet and cold locations. UL listed and Title 20 Compliant.