The entry-level modification is to change the original vehicle's main engine to CD, VCD, DVD, MP3 and so on. Now, the most popular device on the market is FM +CD+MP3+U disk + memory card's audio device, and its incomparable compatibility will be popular. There is not much technology to change the host.The entry-level modification is to change the original vehicle's main engine to CD, VCD, DVD, MP3 and so on. Now, the most popular device on the market is FM +CD+MP3+U disk + memory card's audio device, and its incomparable compatibility will be popular. There is not much technology to change the host.The entry-level modification is to change the original vehicle's main engine to CD, VCD, DVD, MP3 and so on. Now, the most popular device on the market is FM +CD+MP3+U disk + memory card's audio device, and its incomparable compatibility will be popular. There is not much technology to change the host.