... electric power, telecommunications, meteorology, railways, oil field, construction, measurement, research and teaching units, industrial and mining enterprises ... repairing electrical lines.Power sourceDC6V, alkaline battery LR6 1.5V×4Testing MethodSplitcore type CT, true RMSRange0. ... )AccessoriesTester: 1 PCS, Current clamp: 1 PCS, Instrument bag: 1 PCS, RS232 Com-cable:1 PCS; Software Disk: 1 PCS III ...