Waterproof coating: gel coating to refuse the erosion of moisture, enhance the practical cycle, do not have to worry about the impact of fog, rain, snow or heat and humidity, so you can easily drive into the home Save money: it is very difficult to find professional repair personnel engaged in these devices, now you can DIY to solve the main arm failure problem, which is very simple and saves you money GTO (R4918) Replacement Rev Counter Board (SW3000XLS/4000XLS Series) Item Number:R4918 Rev Counter Board by GTO/Linear Pro For use with the SW3000XLS/4000XLS Series Gate Operators Note:There is no manual Colour:As Shown Material:ABS Package Contents: 1 * Rev Counter Board Only 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.