salman_ksa 
cowboys: i havent installed camera though, but its pretty simple. I dont know abt the rest, but this one gives option for two cameras (right and left). There is an option in the settings whether you wana view the right camera or the left one.
For blue tooth, just activate bluetooth from your handset and search for devices. It shows 'car kit' device. connect to it. You can listen callers voice from your car speakers and there is a built in mic with a good frequency (i.e you can speak while driving and it will capture your voice and transmit to the receiver)
