The EBD (electronic bypass) style are self-contained units that give you the static control mounted to the damper. It is an "all-in-one" design that makes the installation process much easier than most electronic bypass dampers. The static pressure can be adjusted in the field between 0.5 to 4 in of pressure. This is done by the turn of a set-screw.
Ultra-Zone™ Electronic By-Pass Damper, Static Pressure Control, Series: EBD, 24 VAC, 50/60 Hz, 14 in Damper, Terminal Block Connection, Round, 24 ga, Crimped Edge Mount, Steel, Galvanized, Domestic