I agree I bought one that plugs in or tunes to a radio station nothing is working plus the car doesn't have an AX plug either. So frustrating I probably would have bought something eles. This is the 1 thing I hate about my 2019 blazer permire!!!! Awesome system that I really don't use that much!!!I've bought two external CD players plugged them into the USB port and they are not recognized. It is like they don't exist. Does anyone know what external CD players will work with this car. This is frustrating.