HEAT INSULATION Features: 1000V, 500V, 250V test voltages Measure Insulation Resistance to 10GOhm Large LCD display with analog bargraph Lo Ohm function for testing connections Automatic discharge of capacitive voltage charges AC/DC voltage measurement up to 999V Manual data record and read function (9 sets) Live circuit display warning and beeper Autoranging insulation measurements to 10GΩ plus manual datalogging stores up to 9 data sets. Includes: Carrying Case AA Batteries Test Leads Specifications: Insulation Resistance:  4MΩ, 40MΩ, 400MΩ, 4000MΩ, 10GΩ Max Resolution: 1kΩ Basic Accuracy:  ±3% Insulation Test Voltages: 250V, 500V, 1000V AC Voltage Test:  Yes Low Resistance Test: Yes Power source: 6 x AA batteries Dimensions: 9.3x4.6x2.1" (235x116x54mm) Weight: 1.15lbs (520g)