Compatible with cars (VW Volkswagen: Touran, Golf, Rabbit, GTI, Caddy, Jetta/GLI, Tiguan, Passat, Touareg, Phaeton, Scirocco, ... Audi, ...) which require a direct CAN connection for diagnostics. http://www.ross-tech.com/vcds/canbus.html Fully backwards compatible with older cars using a single K-line or K plus L.
What can it do? Too many things you can play on your car: fault check, disable/remove DRL (Daytime driving lights), Removing Seatbelt Chime, Operating Windows and Sunroof with Remote. Changing honk/flash behavior when alarm is disarmed, SRI (Service Reminder Interval) reset, ..., diagnose and hack.
Check it on http://www.ross-tech.net/vag-com/advertising/WebBrochure.pdf and http://www.ross-tech.com/vag-com/cars/index.html
Download software from http://www.ross-tech.com/vcds/download/current.html No Registration/Activation required with this genuine hardware.