The Klein Tools ET310 AC Circuit Breaker Finder GFCI Outlet Voltage Tester is a compact and reliable tool for testing electrical circuits and outlets within the 90-120V AC range. This circuit breaker finder includes a transmitter, receiver, user manual, and 9V battery, making it easy to use and transport. With its orange color and Klein Tools branding, this device is both functional and visually appealing. The ET310 model is designed by Klein Tools, known for producing high-quality electrical testing equipment.