ELM327 OBD2 OBDII USB Cable V1.5 Car Diagnostic Interface Scanner Tool
The processor is an ELM327. OBDII Protocols OBD2 Scantool by Ivan Andrewjeski. Clear trouble codes and turn off the MIL ("Check Engine" light). OBDII for ELM322 by David Huffman. The output protocol (connection to laptop) is USB.