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This set contains a 5½” mains tester (BB-MT100) & a digital circuit tester (BB-CT102). The mains tester has a testing range of 100-250 Volts & comes with a handy pocket clip. The circuit tester offers direct test & induction breakpoint detection & has a test range of 12-250 Volts. Both units are CE Approved. Product SKU ST-HD-MT110 x 1