Humidity Sensor, Wall Mount, Warmer/Cooler Adjustment, Voltage 14 to 30 VDC, 20 to 30 VAC, Connection Screw Terminals, 3-3/16 x 3-3/16 x 1-5/16 In., Features 3 Percent + Nickel 1k ohm, For Use With Any BAS/DDC System. This item has been restricted from sale in the following state (s): []