MULTISTAGE THERMOSTAT SUBBASE

MULTISTAGE THERMOSTAT SUBBASE, SYSTEM SWITCHING:OFF-AUTO FAN SWITCH:AUTO-ON HTG/CLG 24V USE W/T874A,B,C,D,E & F STATS, WEIGHT; 3.1 OZ, DIMS; H 5 7/16" X W 3 1/2" X D 7/16", MFG / BAG, ORIGIN; USA