The program lets you perform the following operations: Operating voltage: 12V, internal protection from short circuits/overvoltages Indicator LEDs: OBD Tx/Rx, RS232 Tx/Rx, Power The software supports two platforms - DOS and Windows. To uninstall the program, simply delete the entire contents of the folder where the program resides. Simply extract the files into a folder on your computer's hard drive, and you're ready to go. The program is very user-friendly, and easy to learn. 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. The output protocol (connection to laptop) is USB. It supports all OBD-II protocols and is dispatched with a number of compatible programs.