FARMA's most popular controller primarily due to its low weight and price is our electrical on/off controller. The electrical on/off controller is available with 3, 4 or more electrical functions depending on your needs. The electrical on/off controller consists of two main parts. The part of the controller that controls the electrical functions is mounted in a protective box on the crane. The other part is a 4-function controller with buttons which is used from the driver's cab. The functions controlled by the electrical on/off controller are the support legs and grapple and in appropriate cases also the extension.