If you have a laptop or a portable computer I'd suggest AutoEnginuity's OBDII WindowsPC interface instead. It has far more features and is far more capable. It's also cheaper, by about $50 I think.

http://www.autoenginuity.com/

Or you could just buy an entire car computer, They're nifty. Touchscreen, GPS navigation, exterior camera controls, parking sensors, OBDII scanning, internet connection, music and multimedia:

http://trc12volt.com/