1、MAIN PURPOSE: The speed control unit is an all electronic device designed to control generator speed for fast, precise response to transient load change. 2、CLOSED LOOP CONTROL: When connected to a proportional electric actuator and providing a magnetic speed sensor signal, will control engine in sync or droop mode. 3、GOOD PROTECTION: With protection against battery reverse voltage, transient voltage, accidental actuator short, speed sensor signal or loss of battery power. 4、WORKING RANGE: The power supply voltage is DC12‑24V, the frequency setting range is 1000‑7000Hz, and the speed sensor signal range is AC1‑50V, 85‑8500Hz. 5、PLASTIC SHELL: The generator controller shell is made of ABS plastic, has good toughness, wear resistance and aging resistance, with a long service life. 1 x Generator Governor1 x User Manual Item Type: Generator Speed ControllerModel: ESD2210-12Material: ABSPower Supply Voltage: DC12-24VMaximum Output Current: DC 4AFrequency Setting Range: 1000-7000HzSpeed Sensor Signal Range: AC1-50V, 85-8500HzExternal Frequency Adjustment Range: ±300HzIdle Speed Adjustment Range: Set speed -3800Hz to -1300Hz