This system will allow you to control the electronic engines RPM, either a set engine speed or a variable engine speed (Increase or Decrease). It will also control your remote stopping and starting of the engine. This system takes the radio remote signals or the manual switch signals (Positive or Negative) and converts them to allow them to control the engines RPM, stopping and starting of the engine. This system is very versatile, it also has been used to control other functions such as Crane Power, Radio Remote Power, PTO Safety Features, Hydraulic Oil Cooler, and Spot Lights. The EDR II body measures 5"X5"X2". The body and connector are both weather proof, allowing for versatility when you are installing the system. This product is very reliable and comes with a limited Lifetime Manufacturers Warranty.