The Milwaukee 2222-20 9V Battery Circuit Breaker Finder with LED is a portable and efficient tool for locating electrical circuit breakers in a building. With its compact size and bright LED light, it illuminates the area for easy identification of the circuit breaker. The 9V battery technology ensures reliable power source, making it convenient for use in various electrical applications. The included battery makes it ready to use straight out of the box, making it a practical addition to any electrician's or technician's toolkit.