It is a low-cost OBD2 scanner that works well. I have a plug-in hybrid car that displayed the "check engine" light. I borrowed an expensive OBD2 scanner from my coworker. The scanner detected issues, and I corrected them. However, the "clear" menu did not work to turn off the "check engine" light. It appeared as cleared, but the "check engine" light reappeared when I started the engine. Then this much cheaper scanner arrived in a package. Just plugged in and one click of the "clear" button, it surely cleared the "check engine" light. I am satisfied with this product for its low cost and good performance.