Metro Electronic Products manufactures Digital Insulation Tester . Metro Electronic Products also offers Anemometers, electronic, audio meters/sound-level/db meters, automobile meters, electronic, clip-on meters/tong testers, frequency counters/meters etc.Digital Insulation Tester is a megger or an insulation tester across a device or coil. The Digital Insulation Tester has Data Hold facility and Sound And Flash Alarming. The Digital Insulation Tester is battery powered and displays 2000 counts on the LCD.