â·ÃÊͺ¶ÒÁÃÒ¤Ò The Extech CB10 is a three-in-one electrical tester that is ideal for locating circuit breakers and testing receptacle wiring. CB10: AC Circuit Breaker Finder/Receptacle Tester Locates circuit breakers and tests receptacle wiring Features: Quickly locate 110V to 125VAC Circuit Breakers and Fuses Variable Sensitivity adjustment to pinpoint correct circuit breaker Bright Red and Green LEDs indicates if receptacle is correctly wired or six fault conditions Push button GFCI test Audible and visual circuit breaker indication Convenient storage position for transmitter/receptacle tester Eliminates circuit interruptions Specifications: Dims/Wt: Receiver: 6.4x2.2x1.5" (162x55x38)/4oz (113g) Transmitter: 3.25x1.75x1" (83x44x25mm)/1.6oz (45g) CB10 Extech Multimeter Replace Tester Voltage Detector