Insulation resistance measurement: Selected test voltage: 50, 100, 250, 500, 1000 V, - continuous indication of insulation resistance or leakage current, - automatic discharge of capacitance of tested object after the insulation resistance measurement, - acoustic signalling of five-second periods to facilitate obtaining time characteristics, - indication of actual test voltage during the measurement, - protection against measuring live objects, - three-lead measurement. Continuity measurement of protective and equipotential conductors according to EN 61557 - 4 with the >200 mA current Low-voltage circuit continuity and resistance measurement: - circuit resistance measurement (<1999 ) with the <15 mA current, - quick sound signal if circuit resistance is below 30?. Capacitance measurement during the RISO measurement Measurement of alternating and direct voltages in the 0...600 V range. Power supply: 4 AA disposable or rechargeable batteries, monitoring of power supply voltage. Meter conform to EN 61557.