... most basic instrument include an ammeter, voltmeter, ohmmeter and continuety tester. * It controls & programs variey of speed & slow dome ... or RJ422 UTP Cable tester: Direct or cross cable, Continuity&Discontinuity, Short, Min-wire, Split pair testing. AC/DC Voltage Max ... 400V, 10A Internal Fuse 250V, 800mA CCTV Tester