Data hold function keeps measurements on the large display while you record them. Open up the support stand to prop up the MSR-R500 and make reading measurements easier. The rubber sleeve ensures that the multimeter is always protected from wear and tear while on the job. 2 built-in ceramic fuse tubes make the multimeter secure and reliable. Overload protection is active on all ranges. Connect the test leads with the object tested. The buzzer will beep if there is a complete path. A crystal clear backlit display makes it easy to read measurements in dark areas or at night. Fit for general electrical work around your house, such as diagnosing outlets, batteries and more. Hand tool for electrical engineer to test and solve electrical issues. Properly test fuses, wire, and even battery to ensure everything is in order for your road trip.