The Lisle Digital 3-30V Circuit Tester - 29050 is an advanced tool for diagnosing and troubleshooting electrical circuits. This product features a built-in digital display for easy viewing and a unique design that allows for testing of up to three circuits at once. The tester provides accurate readings of voltage, current, resistance, and continuity. It also includes a bright LED light for easy viewing in dark areas. The Lisle Digital Circuit Tester 3 is a must-have tool for any electrical technician, and it comes with a one-year warranty.