Kewtech Kewprove 3 690V Proving UnitEssential for proving circuits are dead before commencing work. The high output will drive low impedance testers such as traditional test lamps as well as modern two pole testers – the one to have to be confident that it will work with your tester. It even steps down through the voltage stages to prove each stage as well.Benefits:High output will drive even the most high current voltage detectorInstant ramp up and then step down will prove several voltage levelsFeatures:Essential for proving that circuits are not live when working on electrical circuitsMakes a perfect partner to the KEW1780 / 1790 voltage testers