Product/Service Name
Bluetooth ELM 327 OBD2 Car Diagnostic Interface

Complete Description
It is basically a Bluetooth adapter that plugs onto OBD2 port of vehicle. Any bluetooth cellphone or laptop/PC with proper software can then access and display the OBD data from the car.

Average Market Retail Price / Street Price
US$20 in Amazon

Sample Links
the hardware to buy

a cool android software here have free version too!

Comment
This is a very good alternative to Scanguage! I want one or two!