An inexpensive alternative to expensive taut band (swing needle) me ohmmeters, the M500 provides fast and accurate measurements to verify the condition of insulation. Impact resistant. Soft carrying case included. Measurement/function - insulation resistance. Range - 0 to 1000 me ohms. Applications: Test motor winding insulation and diagnose heat damaged, deteriorating insulation in hermetic refrigeration compressors, appliances, panel boards, relay control circuits, motors. Measure insulation values up to 1000 me ohms at 500 VAC Zone scale to indicate insulation condition Hand held Test Leads store in case Operates on 2 C batteries (not included)