This system will allow you to control the electronic engines RPM. It gives you a set engine speed, remote engine stop and start 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. The EDR III body measures 4"X4"X2". The body and connector are both weather proof, allowing for versatility when you are installing the system. This product is very reliable and come with a limited Lifetime Manufacturers Warranty.