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Sperry Dual Phone Line Tester
Item #:13920795 | Quantity Available: 2
$7.49 Regular

QTY:
For common problem conditions with standard single or dual-line telephone hook-ups. Compact, plugs into any single or dual-line telephone jack. Can be read from any angle. Green means line is OK, red - reversed line, amber  - AC voltage present, not lit - dead line.