I ordered an alpine double din head unit, amp, backup camera and under seat subwoofer. I installed it all and radio and carplay and usb all had horrible sound and skipped like a broke record. Tried calling and was told they no longer have technical support by phone so I emailed and never heard back. Called an alpine stereo distributor and he said the Alpine amp was junk and he's removed a few of them. I ended up removing the amp that attaches to the back of the radio and all was great. If you're going to sell products you should probably have customer support! Do not buy from this company!