Feature:This product adopts full electronic closed loop design.It can control a wide range of engines.Fast and precise response to instantaneous changes.It can prevent reverse battery voltage, instantaneous pulse voltage.Easy to install, pre-adjustable, adjustable speed work idle.High reliability and it can withstand all kinds of electromagnetic interference around the engine.Specification:Model: ESD5111Speed control unit: IEZ68-842Speed stability: better than 0.25%Speed range: 1KHz-7.5KHzThermal stability: up to 1%IDLE adjustment: 16020Hz-95% of rated speedDROOP adjustment: Minimum position is 15Hz 6Hz / load current change per ampereMaximum position 400Hz 75Hz / load current change per ampereExternal speed adjustment: 200Hz (external 1KQ)Package list:1 * Engine Speed ControllerNote:The actual product color may deviate from the photo due to light.There may be a slight deviation in the measurement of product.