SPX Stone/Fenner 4-pin handset controller used on a variety of hydraulic power unit applications. Part number KG13A (4087-AC) and is a control handset for a variety of applications using the Smart Start solenoid (KS5). It works with pumps/power units on construction trailers, lifts, hoists, presses, dump beds, landscaping trailers, bale spikes, snow plows, and a variety of other applications. It has a four pin weather-proof connector plug for double-acting power up / power down (PU/PD) hydraulic power units. This controller has a 10′ cord. D/C voltage only.