1. Controller version 13398-DO, upgrade, uses high-quality FR-2 copper-clad laminate, upgraded solid capacitors, high-precision welding process, and waterproof coating, which has excellent insulation, moisture-proof, and leakage resistance. The process complies with OSM standards, high-quality materials and craftsmanship. After usage testing, quality inspection, aging testing and customer feedback, the quality has far exceeded part number2. Replacement Controller V-Sync II, 2118523. 13398-DO slide controller, Dual Synchronous Velocity Slide Controller Compatible with for In-Wall Slide-Out on RV4. Power Connection: 12V DC input. Unit will operate from 8V DC to 18V DC5. Installation is very easy, please confirm whether your model is suitable before purchasing.Function: Our wall replacement controller component is designed to quickly restore the RV's sliding out function, ensuring quick recovery to better operating conditions, minimizing downtime, and allowing you to immediately return to the road.13398-DO slide controller Replacement Controller V-Sync II, 21185213398-DO NEW Controller Version - 211852Easy Installation:As a precisely matched component, the installation process of our wall mounted replacement controller component is very easy. This controller does not require assembly and the installation process is extremely simple. It can be installed in a few minutes, saving time.Tips:The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance.Colour:As ShownMaterial:MetalPackage Contents:1 * Synchronous Velocity Slide ControllerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.