Feature:1. Versatile Application: RC engine sound module simulates realistic sound effects with 5W speaker, ideal for RC tractor, construction vehicles, container trucks, excavator models, etc.2. High Compatibility: Imitate high frequency sounds based on throttle position for enhanced realism and playability in RC Model Cars, Crawlers, and Racing Accessories 1/10 1/8 1/6 scale.3. Enduring and Dependable: Enhance your model's authenticity with this plastic and copper module, compatible for 5-8.4V power supply, installed between the receiver and ESC.4. Upgrade Design: Design the frequency of the sound effects by adjusting the throttle lever, delivering a more immersive experience as the throttle is manipulated up and down.5. Enhanced Performance: Experience variable sound levels that correspond to throttle positioning, adding depth and excitement to your RC model's performance.Specification:Item Type: RC Engine Sound SimulatorMaterial: Plastic + Copper Voltage Compatibility: 5-8.4V.Package List:1 x RC Engine Sound Simulator