Megger MIT481/2 Insulation TesterMIT481 2 Telecommunications Insulation and Continuity Tester 50 100 250 500V + 600 V CAT IV, 3 Terminal Switching, ??, 10M? Input Impedance Insulation and continuity testers for communications engineers The MIT480 2 series offers handheld insulation and continuity testers with up to 500 V and 100 G range. Features include gated voltage access, rechargeable options, differential measurement, 600 V AC DC voltage measurement, and Bluetooth data transfer.