Raven ISOBUS Product Controller, This Controller Is Responsible For: Variable-rate Product Application, Section Control, Reading Flow Meters, Controlling Hyd Or Electric Rate Valves, Communicating w/ An ISOBUS-compatible Display (Raven Viper Pro, Envizio Pro, Viper 4, Some John Deere, Case IH, Ag Leader, Etc, Depending On Software And Licensing), SN: 0000200640