Multifunction Ground Earth Resistance Meter 0-1200 Current 20A Loop Non Contact Tester ,Easy to Use

Working temperature and humidity:-10-40; below 80%rh Storage temperature and humidity:-20-60; below 70%rh Insulation resistance:Above 20M (500V between circuit and case) External magnetic field:<40A/m External electric field:<1V/mYou may also like UM34C Type-C USB 3.0 Tester Multimeter Voltage Current Tester Meter Voltmeter Ammeter Digital 2 Way PD Trigger 4-24V 0-4A ,Portable.