The Electric/Hydraulic Spreader Control from Buyers Products gives you industry leading value and performance in proportional spreader operation. Electric control systems eliminate the need for bulky hydraulic controls in your cab. Two systems are available, both featuring proportional valves housed in a weather-protective enclosure and a weatherproof, corrosion-free wiring harness. HV715EP/HV1030EP The 12V Programmable Controller with LED Display has auger-conveyor/spinner controls. It's available in two models for higher or lower GPM needs. The GPS option is not available for these models.