Power Probe PP319CARB (PP319FTC-CARB) III 'Carbon Fiber Edition' Circuit Tester Kit Carbon Fiber Design Housing 20 foot jumper lead Continuity tester Relay and component tester Works on 12-24v Sources Once you connect a power probe to the power source you'll have a multitude of testers right at your fingertips Bad ground indicator Continuity tester Short circuit tester Relay and component tester