Reliable and efficient insulation testing in the field. Single range testing voltage 500V, insulation meter up to 2000 Mega-Ohms. Built tough to withstand a 1-meter drop onto a concrete floor. Bright LED luminous scale. Check for live circuits and for the battery status. Hard case in a body, quick and easy storage without disconnecting the leads. Testing voltage: 500VDC. Rated Resistance: 1000 Mega-Ohm. Accuracy: +/-5 percent of indicated value 2 - 1000 mega-Ohm. Lower limit resistance: 1 mega-ohm (measurement resistance value to be maintained testing voltage). Overload protection: 1200 VAC (10 Sec). AC voltage measurement: 0 to 600V (50/60Hz), +/-5 percent of maximum scale value accuracy, 500 Kilo-ohm or more input resistance. Other functions: bright LED luminous cale, drop proof, battery check, live circuit check, auto discharge. Power supply: AA alkaline battery x 4, continuous use: 15 hours (at 500V range, no load). Measures 159mm width by 177mm height by 53mm depth. Supplied accessories: test lead L9787, Instruction Manual, LR6 (AA) alkaline batteries x 4, Shoulder strap.