Zone Panel, Overall Height 11 1/2 in, Overall Width 8 in, Requires Thermostat Type 2 Cool, 2 Heat, Terminal Designations C, G, L, M1, M4}M6, O/B, R, Rc, W, W1/E, W2, Y, Y1, Y2, Number of Zones 3, Housing Color Gray, Product Type Zone Panel, Nameplate Voltage 24V AC, Includes AT140A1042 40 VA transformer, DATS C7735A1000 Discharge Air Temperature Sensor, Minimum Ambient Temperature -40 Degrees F, Maximum Ambient Temperature 165 Degrees F, Overall Depth 1 7/8 in