Active Master-Voltage-Continuity-Tester-Laserliner-083-021A-p-The-Laserliner-Active Master-is-a-practical-&-reliable-device-for-testing-voltage-&-continuity-It-provides-automatic-AC-&-DC-voltage-testing-&-automatic-range-&-function-changeover-for-direct-testing-&-measurement-In-addition-it-can-be-used-for-single-phase-&-rotary-field-testing-with-phase-sequence-display-&-also-single-pole-phase-testing-The-automatic-continuity-tester-has-an-acoustic-signal-p-p-The-Ac