The Midtronics Micro 500 Battery Starting Charging System Analyzer is a reliable tool for testing AGM batteries, with the ability to detect bad cells. This 12V unit comes with a carrying case for easy portability and is manufactured in the United States. Though it does not come with a warranty, it is a valuable addition to any automotive tool collection, providing accurate analysis for charging system maintenance and troubleshooting. Unit is used, in good condition and was tested with actual photos shown here.