I am fully satisfied with this transmitter. It works very bien.Il no instructions but it is very easy to set up (much simpler than the one I already have). You plug a USB key or SD card is set to a station and go. The only complaint I can make him is at the cigarette lighter, it is quite long and it greatly exceeds the ashtray of my 407. I have not tried the remote control because I do not use it. Regarding the seller: Fast delivery. Very neat package. In summary, this is a very good deal. I recommend. @ Soon.