Klein 90V to 120V Circuit Breaker Finder with Integrated GFCI Outlet Tester is a precise and efficient tool designed for both electricians and homeowners. This device quickly and accurately identifies the correct breaker in a panel connected to an electrical outlet or fixture. Operating on 90 to 120V AC circuits, it features a transmitter that plugs directly into outlets and a receiver that scans circuit breakers, providing visual and audible feedback when the correct breaker is found. The transmitter also serves as a GFCI tester to verify outlet wiring and test GFCI devices, ensuring safety and reliability. For added convenience, the transmitter docks into the receiver for compact storage. Built to withstand tough jobsite conditions, it boasts a 6.6-foot drop rating and a CAT II 120V safety certification, making it a durable and trustworthy tool for electrical work. Model Number: ET310