... DVR. * It combines the most basic instrument include an ammeter, voltmeter, ohmmeter and continuety tester. * It controls & programs variey of ... 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