Easy to use, it is a precised measuring instrument with 6000 counts, high precised, and build-in backlight With functions such as polarity indication, overrange indication, data saving, and automatic saving This instrument is a battery powered insulation resistance tester that can be used to measure voltages, resistance, on-off, diode, and insulation resistance Innovative inclined adjustable stand, which can place on a table for fixed standing When measuring insulation resistance, four voltages to choose from: 100V, 250V, 500V, and 1000V, Manufacturer: FHGSPQWM