The Milwaukee GFCI Receptacle Tester & Voltage Detector 2226-20 is a portable electric tester designed for detecting voltage and continuity in electrical outlets. With a compact and durable plastic construction, this red-colored tester from Milwaukee is easy to use and ideal for various electrical testing needs in the home or workshop. Its reliable measuring technology ensures accurate results, making it a valuable tool for ensuring electrical safety and functionality. Made in China, this GFCI receptacle tester is a crucial addition to any toolkit for electrical testing and troubleshooting.