🔧 Get the job done right with Klein Tools ET600 – your ultimate electrical ally! High voltage detection with alarm for peace of mind. Measure insulation resistance across multiple voltages. Test and lock buttons for seamless functionality. Backlit display for easy reading in any environment. Experience accurate readings with TRMS technology. 1000V AC/DC measurement 4000MΩ resistance 6 AA batteries included The Klein Tools ET600 Multimeter is a robust insulation tester designed for professionals, measuring insulation resistance up to 4000MΩ at various voltages (125V, 250V, 500V, and 1000V). With user-friendly features like a backlit display and automatic ranging TRMS technology, it ensures accurate and reliable results for all your electrical diagnostics.