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Testboy 20 Plus Voltage Proofed Continuity Tester Testboy TESTBOY 20 P The Testboy 20 Plus is a Voltage Proofed Continuity Tester that can detect AC voltages through the insulation It can also find defective lamps in chains of Christmas lights or similar accurately within seconds P P The electronics can also perform a single pole phase search This simple to use and the versatile tester makes the Testboy 20 Plus an ideal addition to the toolkit of electricians and service technicians
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