Insulation test voltages: 50V, 100V, 250V, 500V and 1000V. Save both time and money with Automatic calculation of Polarization Index and Dielectric Absorption Ratio. Make repetitive test simple and easy with the Compare (Pass/Fail) function. CAT IV 600V over-voltage category rating for added user protection Fluke 1507 is compact, rugged, reliable and easy to use. With its multiple test voltage it is ideal for many troubleshooting, commissioning and preventative maintenance applications. Additional features, like the remote probe on this tool saves both time and money when performing tests. Live circuit detection prevents insulation test if voltage less than 30 V is detected for added user protection. Auto-discharge of capacitive voltage for added user protection. AC/DC voltage: 0.1 V to 600 V; 200 am continuity. Four AA alkaline batteries for at least 1000 insulation tests. Comes with a one year warranty.