The DYVO Circuit Defect Trainer demystifies electrical problems and allow your students to jump right into electrical testing to build essential skills and confidence right away, rather than getting bogged down in electrical theory, formulas, laws, and rules. The distraction-free design makes it easy for students to get started, and the 36 fault combinations built into every trainer will keep them busy troubleshooting with the included DYVO next generation meter or whatever multimeter you have on hand.