The unit came with complete...

The unit came with complete hardware and instructions. It has rich features to include many FM modulator frequencies and 5 levels. If one could adjust the FM pre-emphasis/de-emphasis setting, that would have been nice, since I'm using the unit in a European car. Left unadjusted, this causes slightly subdued highs in the music, but still sounds quite good with increased treble. Sound quality varies widely with different encoded MP3 tracks. Its best to play many files, and some factory CDs before making judgements. Most people will find the FM interface to have negligible effects on the sound, when a good source track is played. Some instances of degraded sound quality may be due to source track problems, or a less optimal FM antenna connection. I rated the sound quality down to 4 only because of no FM pre-emphasis control. Still, the unit is a great value, and I only wish it had a wireless display instead of a wired one. The wireless remote works well. Well worth the price.