Voltage measuring instruments, 2.5kv Insulation Tester measurement: selectable measurement voltage in the 100…2500 V range with 100 V step, continuous indication of 2.5kv 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, The ability to charge from car lighter (12 V) socket (additional accessories).