Features ELM327 USB is the latest PC-based scan tool. It supports all OBD-II protocols and is dispatched with a number of compatible programs. The processor is an ELM327 USB. The output protocol (connection to laptop) is USB. Processor:             ELM327 USB OBD-II Protocols:    ISO15765-4 (CAN)                                ISO14230-4 (KWP2000)                               ISO9141-2                               J1850 VPW                               J1850 PWM Output protocol:     RS232 Baud rate:              9600 or 38400 Indicator LEDs:       OBD Tx/Rx, RS232 Tx/Rx, Power Operating voltage: 12V, internal protection from short circuits / overvoltages Nominal idle current: 45 mA Description: OBD-II Software for ELM327 USB is a free program that allows you to use your PC and a hardware interface to get the information from your car's computer. The program is very user-friendly, and easy to learn. It is also very easy to install: simply extract the files into a folder on your computer's hard drive, and you're ready to go. To uninstall the program, simply delete the entire contents of the folder where the program resides. The software supports two platforms - DOS and Windows.   Features: The program lets you perform the following operations: Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning (over 3000 generic code definitions in the database). Clear trouble codes and turn off the MIL ("Check Engine" light) Display current sensor data, including:               Engine RPM Calculated Load Value              Coolant Temperature               Vehicle Speed              Short Term Fuel Trim              Long Term Fuel Trim              Intake Manifold Pressure              Timing Advance              Intake Air Temperature              Air Flow Rate              Absolute Throttle Position             Oxygen sensor voltages/associated short term fuel trims            Fuel System status    Fuel Pressure             Many others...   Upcoming Features:             Data graphing and logging             Freeze Frame data             Continuous and Non-Continuous Oxygen Sensor test results Free software:               Scantool.net:             GM Mode 22 Scan Tool by Terry             OBD Gauge for PalmOS and Pocket PC by Dana Peters             OBD Logger by Jonathan Senkerik             OBD-II ScanMaster by Wladimir Gurskij (ScanMaster 3.52 - local copy)             obd2crazy.com:             OBD2 Scantool by Ivan Andrewjeski             OBDII for ELM322 by David Huffman             pyOBD by Donour Sizemore for MacOSX and Linux             RDDTC by Pete Calinski             Real Scan by Brent Harris             ScanTest for Pocket PC by Ivan Ganev aka a-ser             wOBD by WDT