R122 is designed with an all enclosed 12 person compartment cab, 20kw pto electric generator, 8 quartz lights, 2 150ft electrical cable distribution reels, command center featuring various communications equipment. R122 carries a supply of scott air bottles and packs, tools and portable electrical equipment such as fans and lights. Additionally the vehicle also carries rescue equipment and hydraulic extrication equipment. R122 serves as a firefighter staging and rehab center at incident scenes.