This 12V Fennerstone Electric/Hydraulic Power Unit is for power up/hold/power down applications. The valving is in the top of the endhead which allows easy access and the controller (either customer-supplied or supplied with the unit) will power the unit in both directions. The unit will hold load in the off position. Pressure compensated flow control allows smooth-running functions in both directions. Features include an adjustable relief valve and cartridge valves for easy service and interchangeability. Used with Century, Holmes, and other add-on wheel lifts Adjustable relief valve and cartridge valves for easy service and interchangeability. 2-function power unit 12 volt DC