Model NO.: UT505A Certification: RoHS, CE Insulation Resistance (Test Voltage 50V): 0.01mΩ~50mΩ Insulation Resistance (100V): 0.01mΩ~100mΩ Insulation Resistance (250V): 0.01mΩ~200mΩ Insulation Resistance (500V): 0.01mΩ~500mΩ