Compact, low profile design in neutral finish push to test switch automatic, low voltage disconnect (LVD) 120 or 277 VAC operation injection-molded, V-0 flame retardant, high impact, thermoplastic housing. charge rate/power on LED indicator light LED lamp life of 25 years plus listed for damp location. Universal mounting canopy for side or top installation. Standard AC and emergency units available. Ni-cad battery on emergency (EM) units.