Described embodiments relate to a receiver device for controlling agricultural machinery. The receiver device comprises a receiver module for communicating with an external device throttle control circuitry in communication with the receiver module, configured to override a built-in throttle control mechanism of the machinery and allow for control of a throttle function of the machinery ignition control circuitry in communication with the receiver module, configured to override a built-in ignition control mechanism of the machinery and allow for control of an ignition function of the machinery and auxiliary apparatus control circuitry in communication with the receiver module, configured to override a built-in auxiliary apparatus control mechanism of the machinery and allow for control of an auxiliary apparatus function of the machinery. The device may control at least one of the throttle, ignition and auxiliary apparatus functions in response to control signals received at the receiver module from the external device.
