trace circuits to detect appropriate breaker quickly and easily identify correct circuit breaker or fuse protecting a specific electrical circuit designed for operation at 120v ac, 60hz audible alert and bright led visual indication magnetic back attaches to electrical panels for “hands-free” operation “smart meter” patented technology eliminates the need for adjustment dials when used with cs61200as accessory kit, unit can trace switches, light fixtures, and other energized wiring integrated lead and probe storage operates from one 9 volt battery transmitter integrates into the body for convenient transportation and storage transmitter doubles as a 3-wire cicuit analyzer with gfci test functionality