Total 2 PCS different test lights. Digital Automotive Car Power Probe Circuit Electrical Tester Test Device System. 3.5-36V Digital Automotive Car Power Circuit Electrical Tester Probe Test Light. ✨Widely application: This circuit tester is ideal for checking various vehicles' electrical circuits, quickly checking automotive headlights, taillights, turn signal circuits, faulty sockets, and fuse connections, and also for testing other 6-24V DC wirings and circuits.