Features This product adopts full electronic closed loop design. Professional deisgn: the generator speed controller can control a wide range of engines. Fast and precise response to instantaneous changes. This motor speed regulator can prevent reverse battery voltage, instantaneous pulse voltage. Easy to install, the motor speed controller is pre-adjustable, adjustable speed work idle. Feature: This product adopts full electronic closed loop design. Professional deisgn: the generator speed controller can control a wide range of engines. Fast and precise response to instantaneous changes. This motor speed regulator can prevent reverse battery voltage, instantaneous pulse voltage. Easy to install, the motor speed controller is pre-adjustable, adjustable speed work idle. High reliability and it can withstand all kinds of electromagnetic interference around the engine. Specification: Model: ESD5111 Speed control unit: IEZ68-842 Speed stability: better than ±0.25% Speed range: 1KHz-7.5KHz Thermal stability: up to ±1% IDLE adjustment: 160±20Hz-95% of rated speed DROOP adjustment: Minimum position is 15Hz ± 6Hz / load current change per ampere Maximum position 400Hz ± 75Hz / load current change per ampere External speed adjustment: ±200Hz (external 1KQ) Package list: 1 * Engine Speed Controller Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. Package List