The Extech Continuity Tester Pro CT20 is a reliable tool for testing the continuity of electrical circuits. With the trusted brand of Extech, users can rely on accurate and efficient testing results. Designed for professional use in various industries, this continuity tester is a versatile tool for ensuring the functionality of electrical systems. Whether for electrical troubleshooting or maintenance tasks, the Extech CT20 provides users with the necessary measurements and inspections to keep their systems running smoothly.