Extech MG310 Compact Digital Insulation Megohmmeter is designed to measure insulation resistance up to 5.5GΩ with autoranging. The Extech MG310 features dielectric absorption ratio measurements, polarizations index measurements, high voltage and overload indications, audible continuity, and more. The Extech MG310 is very convenient for troubleshooting transducers, motors, and other industrial appliances.