1. It supports all OBD-II protocols
1. User-friendly, and easy to learn
3. Support two platforms - DOS and Windows.

Deion:

1.ELM327 is the latest PC-based scan tool. It is dispatched with a number of compatible programs. The processor is an ELM327. The output protocol (connection to laptop) is USB.
2.Processor: ELM327.
3.OBD-II Software for ELM327 is a free program that allows you to use your PC and a hardware interface to get the information from your car's computer.
4.The program is 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.

ELM327 Functions:

1.Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning (over 3000 generic code definitions in the database).
2.Clear trouble codes and turn off the MIL ("Check Engine" light)
3.Display current sensor data, including:
Engine RPM;Calculated Load Value;Coolant Temperature;Fuel System Status;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..
4.Upcoming Function: Data graphing and logging;Freeze Frame data;Continuous and Non-Continuous Oxygen Sensor test results

Specifications:
 
1.OBD-II Protocols:

ISO15765-4 (CAN);ISO14230-4 (KWP2000);ISO9141-2;

2.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

3. Free Software:

1)GM Mode 22 Scan Tool by Terry
2)OBD Gauge for PalmOS and Pocket PC by Dana Peters
3)OBD Logger by Jonathan Senkerik
4)OBD-II ScanMaster by Wladimir Gurskij (ScanMaster 3.52 - local copy)
5)OBD2 Scantool by Ivan Andrewjeski
6)OBDII for ELM322 by David Huffman
7)pyOBD by Donour Sizemore for MacOSX and Linux
8)RDDTC by Pete Calinski
9)Real Scan by Brent Harris
10)ScanTest for Pocket PC by Ivan Ganev aka a-ser
11)wOBD by WDT

4.Aavailable Cars:

Benz 2001/02/03 W203 C200K (ISO)
BMW X5 2002 (ISO) Chevrolet Aveo (ISO)
Citroen C3 2004 (ISO)  Daihatsu YRV 2005 (ISO)
Daihatsu YRV Turbo 2006 (ISO)
Fiat Tipo 2002 (ISO)                       
Ford New Focus 2006(CAN)

Honda Accord 2006 JDM (ISO)
Honda Accord Euro R 2004 JDM (ISO)
Honda City GD8 (ISO)
Honda Civic ES 1.6A (ISO)
Honda Integra Type R DC5 JDM (ISO)
Honda Jazz 1.4M (ISO)

Hyundai Accent 2004 (ISO)
Hyundai Getz 1.3A 2004 (ISO)
Hyundai Getz 1.6M 2004 (ISO)
Hyundai Matrix 2004 (ISO)
Hyundai Santa Fe 2.4A (ISO)
Hyundai Sonata GLS (ISO)
Hyundai Sonata 2005 (ISO)
Hyundai Tuscani FX (ISO)

Kia Carens 2005 (ISO)
Kia Magentis 2005 (ISO)
Kia Rio LS (ISO)
Kia Sorento SUV 2005 (ISO)
Lexus es300 Mazda 2 (CAN)

Mazda 5 (CAN)
Mazda 6 (CAN)
Mazda Premacy 2001 (ISO)
Mazda RX8 (CAN)

Mitsubishi Colt 2003 (ISO)
Mitsubishi Colt Plus 2005 (ISO)
Mitsubishi Eclipse(GST-----Turbo Car can be tested for the year 1995-2000,RS/GS----1994-1996 GS all can do;Turbo Car for the year 1996-2000,only have speed and TPS,can clear the DTCS)
Mitsubishi Lancer Evolution IX 2006 (ISO)
Mitsubishi Pajero 3.5 V6 2006 (ISO)

Nissan Sunny B14 (ISO)
Nissan Sunny VIP FB15 (ISO)
Nissan X-Trail 2.0L 2004 (ISO)
Nissan X-Trail 2.5L 2004 (ISO)

Peugeot 206 2001 –Only can show RPM
Peugeot 206 (ISO)
Peugeot 307 (ISO)
Peugeot 407 (ISO)

Renault Megane II 2005 (ISO)
Renault Kangoo 2006 (ISO)

Subaru Impreza 1.6TS 2002 (ISO)
Subaru Impreza WRX 2005 (ISO)

Toyota Camry 2.0A 2004 (ISO)
Toyota Camry 2.4A 2005 (ISO)
Toyota Corolla Altis 1.6A 2005 (ISO)
Toyota Corolla GLXi G8 1999 (ISO)
Toyota Corolla G9 2002 (ISO)
Toyota Vios 2004 (ISO)

5.Not Available Veichles:

Mazda 323 Protege 2003 (OBD-I)
Mitsubishi Lancer 1.6M 2006
Nissan Sunny (N16)
Nissan Cefiro (Teana) 2005
Nissan sentra 1.8 2000/2005
Nissan Cefiro (Teana) 2005
Proton Perdana V6
Subaru Legacy GT 2005
Toyota camry 2002
Toyota Wish JDM (Missing Pin 5 in DLC)
Toyota IST JDM (Missing Pin 5 in DLC)
Toyota altis 1.8 2004
Peugeot 206 2000
Suzuki Jimny 1.3 2000

Package List:

One elm327 USB interface
One CD software