Check the listing for details. ETCR3800B Lightning Protection Component Tester Touch Color Screen ✦KD. Condition: New. Listed at 338.30 USD. Only for ETCR3800B. Insulation resistance Mohm test:Range:0.5~10GΩ. Product Main Function. Insulation resistance. Test Condition. Add to Favourites. Adjusting with step "250V", the maximum can be set to 3000V.