The ESD-5550/70 Series speed control unit is an all electronic device designed to control engine speed with last and precise response to transient load changes.
The ESD-5200 Series speed control unit is an all-electronic device designed to control engine speed with fast and precise response to transient road changes.
The ESD-5500E Series speed control unit is an all electronic device designed to control engine speed with last and precise response to transient load changes.