Product Features: Provides line tracing and detection to confirm the relationship between circuit breakers and individual outlets. Once the transmitter is in place, it transmits a signal to the circuit that the receiver can detect. When a signal is detected, the receiver beeps and its green LED flashes. The sensitivity of the receiver can be adjusted to accurately determine the circuit breaker or fuse protecting the selected circuit. Find specific breaker or fuse Used to protect an over-current LED indicator Exchangeable power tips Adjustable receiver sensitivity Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. voltage: AC110V Material: plastic colour: Yellow+black Package Contents: 1 x Circuit Breaker Transmitter 1 x Circuit Breaker Reciever 1 x 9V (6F22) battery 1 x power plug 2 x Lamp Socket Adapter