Professional Insulation resistance tester features with 5kV 200G High insulation resistance measurement reach up to 200G ohms Wide output test voltage can be selected from 100V/250V/500V/1000V/2500V/5000V. Comes with a fabric case for storage everything The ideal megameter for testing electrical insulation on under floor heat cables, Earthing Shoes. Suitable for measuring the insulation resistance of various electrical equipment and insulating materials such as transformers, motors, cables, switches, electrical appliances, etc. ACV AC Voltage: 750V Frequency range: 40~400Hz Insulation resistance: 1M Ω~200G Ω Accuracy: ±2% of reading + 5 digits Testing Voltage: 500V/1000V/ 2500V/5000V 1999 Counts LCD backlight Auto ranging megohmmeter HV red Indication Lamp Light.