RV5 Vessel TV canceler. Removed from a car used for about 3 years due to a vehicle change. The navigation system is a factory-installed display audio navigation system. There were no problems with the navigation system until removal, and I was able to watch TV while driving. The product was purchased from Amazon, from Kabu Enlarge Shoji. Please handle the installation yourself. Returns and issues after purchase are not supported. ※ I plan to list several items for sale due to the vehicle change.