Code Reader Diagnostic Tool Super Mini Elm327 WiFi with Switch Work with for I-Phone OBD-ii OBD Can WI-FI OBD AUTO CHECKER is able to detect and interpret these protocols automatically. It also provides support for high speed communications and a low power sleep mode. It use AT commands to communicate with a host device (PC, notebook, iPhone, iPod touch, iPad and so on). There are plenty of software packages available, which are fully compatible with WI-FI OBD AUTO CHECKER. Some of them have pretty useful features, such as engine running parameters monitoring, DTC reading and clearing, MPG meter, etc. You can even write your own software on a specified hardware platform if you wish, because the AT commands are fully documented and very well explained. WI-FI OBD AUTO CHECKER is measuring only 2.7 x 1.25x 0.9 inches. It also comes included with a power switch built-in to prevent the need for having to constantly disconnect your unit from the OBDII port. Elder OBD compatible vehicles has a sticker indicates that the vehicle is OBD compatible. Model year 1996 and newer vehicles are compliant by default, and will not have this sticker. Following are Some of The Parameters Which Could be Read From The Vehicle: Vehicle Speed,RPM,Fuel Consumption*,Engine Coolant Temp,Fuel Pressure,Calculated Engine Load,Throttle Position,Intake Manifold Pressure,Air Intake Temp,Timing Advance,Mass Air Flow,Fuel Level,Barometric Pressure,EVAP System Vapor Pressure,Fuel Trim. Note: Your vehicle may not support all above parameters. How many parameters you can get is depended on the vehicle manufacturers implementation. &lt;b&gt;Vehicles Supported