THERMOSTAT SUBBASE FOR USE WITH T874D

THERMOSTAT SUB-BASE, SWITCHING: HEAT-OFF-COOL FAN AUTO-ON, THERMOSTAT SUB-BASE FOR USE W/T874D, VOLT:24, MULTI-STAGE, COLOR:BROWN, WEIGHT: 3.4 OZ, DIMS: 5/8"H X 3-1/2"W X 5-1/4"D