System Application: Conventional, Gas, Oil, Electric, DualFuel, Forced Air HVAC systems; Stages Heat/Cool: Conventional -(2H/2C) Heat Pumps -(4H/2C) 2 stage heat pump + 2 stage AUX / 2 stage cool; Power Method: Hardwired; Terminal Designations: C, Rc, Rh, G, O/B, Y1, Y2, W1, W2, Acc+, Acc-, PEK+; Color: Silver; Volts: 24; System Switching: Heat/Cool/Auto; Dimensions L x W x H: 2.9"x6.9"x6.1"; Wt. Lbs.: 0.53lbs; Connected: Yes;