Features:
COM  connector plugs into most modern laptops! 
Compatible with the latest cars which require a direct CAN connection for diagnostics including all Golf-5 platform cars and latest Audi A3, A6 and A8.
Protocol timing indistinguishable from a real VAG/VAS tool.  Works reliably even with "difficult" control modules such as the 1991-1994 1Z Audi TDIs and the 1993-1994 Audi 2.6L with Hella ECU.
Built-In VAG-Saver functionality -- instantly alerts the user if either the K/K1 line or the L/K2 line is shorted to Ground or Vbatt.
Full support for dual-K lines found in "new" (B6/8E chassis Audi A4 and 2002+ Audi A6 -- no VAS-6017 required -- no manual switches!
Fully backwards compatible with older cars using a single K-line or
K plus L.
Bi-Color (red/green) status/activity LED
Support HEX-COM-CAN Interface compatible with VAG-COM 504.1