AMPROBE AMB-2 Battery Operated Megohmmeter, 250/500VDC. More details: Battery Operated Megohmmeter, Output Test Voltage 250/500VDC, Insulation Resistance Range 50 to 100 megohm, Live Circuit Detection 0 to 600VAC/DC, Resistance Range 0 to 100 ohm, Display Analog, Accuracy 0 to 10M Ohms +/- 5 Percent of Reading, Over 10M Ohms +/- 10 Percent of Reading, Power Source (8) AA Batteries (Not Supplied), Includes Test Leads (MTL-6), Carrying Case, Adapter Clips (MTC-3) and Fuse (8AG-361), Manufacturers Warranty Length 1 yr.