1. It was designed as a USB to serial interface cable for communicating with and programming various electronic products. 2. The output is RS-232 compatible and the serial interface connection is a 2.5mm Stereo Plug. 3, It also turns out to be compatible with the Abbott FreeStyle series of blood glucose meters to communicate between their PC based monitoring software and their Freedom and Lite meters with data ports. 4. The cable has been tested with the following meters and has been found to be compatible. FreeStyle Freedom FreeStyle Lite