Autel's AutoLink, No. AL539, comes as a OBD II and electrical test tool that supports all 10 modes of OBD II for a complete diagnosis. Features a unique patented one-click I/M readiness key, graphing digital multimeter, starting and charging system tests, TFT color display, and built-in speaker. Streamlines automotive service and help ensure rapid, accurate diagnosis and timely repair, according to the manufacturer.