The Sealey AK4030 Circuit Tester is a professional diagnostic tool for quick and accurate testing of electrical circuits in 6V, 12V and 24V systems. This continuity and circuit tester is essential for automotive technicians, auto electricians and vehicle maintenance professionals who need to verify electrical connections and identify polarity in low-voltage applications. The probe features intuitive LED polarity indication, with red and green LEDs clearly showing positive and negative connections respectively. This visual feedback enables rapid fault diagnosis and circuit verification without the need for additional measuring equipment. Supplied complete with a generous 1.5m cable and shrouded earth clip, the tester provides safe and convenient access to test points throughout vehicle electrical systems. The compact, lightweight design makes it ideal for workshop use or mobile servicing applications where space is limited. Features and Benefits:Compatible with 6V, 12V and 24V system