Feature:1. Designed to control engine speed with fast and accurate response to transient load changes.2. The speed controller provides a series of protection once the power supply is reversely connected.3. This engine speed controller allows for 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, and the adjustment is very simple.Specification:Item Type: Engine Speed ControllerProduct Model: S6700EWorking Voltage: 12-32V DCOutput Voltage Range: 0-5ASpeed Range: 1K-7.5KHZSpeed Fine-Tuning Range: ±200HZSpeed Fluctuation Rate: +0.25%~-0.25%Speed Signal: 0.5~120VRMSSteady-State Rate (Speed Drop): 0~5%Temperature Drift: < +5% ~ -5%Ambient Temperature: -30 ~ +70 degreesVibration: <100HzRelative Humidity: <95%Function: 1. Speed Control2. High and Low Speed Conversion and Speed Fine-Tuning3. Automatic Parking Protection4. Adjustable Steady-State Rate (Speed Drop)5. High-Speed Start6. Full Speed Regulation7. Parallel Function Package List:1 x Engine Speed Controller 1 x User ManualNote:S6700E is a for Engine Speed Controller, please connect correctly according to the wiring diagram of the manual.