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Martindale TEK404 Audible and Visual Continuity Tester Martindale MARTEK404 P The Martindale TEK404 continuity tester adds a visual indication as well as audible indication and comes complete with a belt clip Featuring a bright LED the TEK404 also has a safety measure to prevent use on live circuits and a loud buzzer for use in noisy environments P P The tough construction and simplicity makes it ideal for use in a wide variety of applications including low voltage signalling process
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