Zone Control Kit, 3-Zone, TrueZone®, 1 Heat Stages, 1 Cool Stages, Temperature Setting: -40 to 165 Deg F, Terminal Designation: Three Of M1,M4,M6,R,C,W,Y,G, One Of RH,RC,W,Y,G,DS/BK,R,C,DATS,DATS, LED Display, 24VAC Power Source, 18 to 30VAC Voltage Rating, Wall Mount, Gray, 8-1/8 inch Height, 8 inch Width, 2 inch Depth, Includes HZ311 Zone Control Panel, AT140 Transformer, C7735A Discharge Air Temperature Sensor, Standards: FCC Class B, For Use With: True Zone Systems, or RedLINK™ when used with 3RCP1, 50/60 Hz Frequency, Humidity Range: 5% to 90% RH Non-Condensing