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Martindale 13A Socket Tester with Audible Warning Martindale BZ101 Safe and simple to use the BUZZ IT from Martindale is a real improvement for awkward sockets It has an audible signal to tell you instantly whether or not the wiring is correct and can also be used as a fuse finder as the correct fuse is located when the buzzer stops If there is a problem the pattern of neon lights indicates the fault Any results other than three indicators lit and a continuous buzzing tone shows a fau
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