B+ F Rugged UPS 1.Electromagnetic Compatibility performance meets the rules of Military Standard GJB-151A-97 GJB152A-1997 2.Aluminum Panel, Stainless steel back chassis 3.Mother board inside and other PCB are anti-rot, anti-salt fog, anti-shock, anti-tumble 4.Work Temperature: -10 - 60 5.All of the external interfaces are rugged aviation plugs.