Volume 141 Catalog Page: 124, 1262H/1C heat pump and 2H/2C conventional20 to 30 VACAuto or manual changeoverFan: auto, on, circulate, follow scheduleSystem: heat, off, cool, auto, emergency heatHeat 40° to 90F; Cool 50° to 99FDual powered: battery or hardwired4-1/16"W x 4-1/16"H x 1-3/32"DTH6220U2000/U