Steps for usage: Insert the product directly into the car OBD interface and connect to the mobile app: TORQUE There is a CD inside the package. There is an app to download in the CD: TORQUE Package Including: 1pc x ELM 327 OBD HH Mini Bluetooth-compatible V2.1 1pc x CD Drive Top 5 Reasons to Get V2.1 Mini Bluetooth-compatible ELM327 OBD HH: 1.This is a vehicle diagnostic tool interface scanner, which is is used to read trouble codes, clear trouble codes and detect fuel pressure and so on. 2.OBDII 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. 3.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. 4. To uninstall the program, simply delete the entire contents of the folder where the program resides. 5.The software supports four platforms - For DOS/Windows/Android. This product is a non-oem, generic product. Notice: This device can't work with IOS system. Mini Bluetooth-compatible ELM327 is the newly developed wireless scan tool. It supports all OBD-II protocols: Works with all OBD-II compliant vehicles Wireless (Bluetooth-compatible) Software included for Palm, PDA Software included for Windows PC Software included for Windows Smartphone Supports ISO 9141, KWP2000 Supports SAE J1850 Supports CAN bus V2.1 Mini Bluetooth-compatible ELM327 OBD HH Car Diagnostic Scanner Functions: 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 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 Package Including: 1pc x ELM 327 OBD HH Mini Bluetooth-compatible V2.1 1pc x CD Drive