The CB10 is an AC Circuit Breaker Finder/Receptacle Tester that locates circuit breakers and tests receptacle wiring. It allows the user to quickly locate 110 Volt to 125-Volt AC circuit breakers and fuses. When the correct circuit breaker is found, flashing LEDs and an audible beeper provide no-miss indication. The CB10 also features a variable sensitivity adjustment to pinpoint the correct circuit breaker.

This product is complete with a year warranty, the receiver and GFCI transmitter and a 9V battery for the receiver.


  • Simply plug the GFCI Transmitter into an outlet and trace for the correct breaker at the electrical box
  • Transmitter and Receiver snap together for easy storage
  • UL Listed and CE approved
  • Tests GFCI circuits
  • LED indication of 2 test conditions and 5 wiring faults


Extech CB10 Circuit Breaker Finder

SKU: 040
    • UL Listed and CE approved
    • Dimensions (Receiver): 6.4 x 2.2 x 1.5” (162 x 55 x 38mm)
    • Dimensions (Transmitter): 3.25 x 1.75 x 1” (83 x 44 x 25mm)
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