1Designed to control engine speed with fast and precise response to transient load changes. 2The speed controller provides a series of protection once the power supply is reversely connected. 3High and low speed conversion and fine speed adjustment. 4Multifunction: Automatic Parking Protection. High Speed Start. Full Speed Control. Parallel Function. 5Steady-state rate adjustment (speed drop) is adjustable. Features: 1. Designed to control engine speed with fast and precise response to transient load changes. 2. The speed controller provides a series of protection once the power supply is reversely connected. 3. High and low speed conversion and fine speed adjustment. 4. Multifunction: Automatic Parking Protection. High Speed Start. Full Speed Control. Parallel Function. 5. Steady-state rate adjustment (speed drop) is adjustable. Specification: Condition: 100% Brand New Item Type: Generator Speed Controller Speed Fluctuation Rate: +0.25%~-0.25% High Speed Setting Range: 1K~5kHz Speed Signal: 1~20VRMS Steady-state Rate (speed drop): 0~5% Temperature Drift: <+5%~-5% Ambient Temperature: -40~+80Impact: 2G Vibration: <100Hz Relative Humidity: <95% Fine-tuning of the Speed: Calibration Speed +200Hz~-200Hz Package List: 1 x Generator Speed Controller Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.