OTC's No. 3630 Battery Powered Continuity Tester is designed to test any type of non-live electrical circuit. Use to track down broken wires, bad grounds, and blown fuses quickly and easily. Features a heavy-duty stainless steel probe with insulated shaft, heavy-duty clip with positive soldered connection, and a slim, ergonomically designed clear handle. Includes 12 foot long red coil cord, AAA battery, and a low voltage replaceable bulb. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.