System Application: Conventional, Gas, Oil, Electric, DualFuel, Forced Air HVAC systems; Stages Heat/Cool: Conventional -(2H/2C) Heat Pumps -(3H/2C) 2 stage heat pump + 1 stage AUX / 2 stage cool; Power Method: Hardwired; Terminal Designations: C, R, G, Y1, Y2, W1, W2/OB, PEK+; Color: White; Volts: 24; System Switching: Heat/Cool/Auto; Dimensions L x W x H: 0.94"x4.09"x4.09"; Wt. Lbs.: 0.4lbs; Connected: Yes