High Voltage Circuit Breaker Tester WUHAN PRIMARY TESTER TECH&SCIENCE CO., LTD. Base Info Model NO.:HYGK-307Temperature:-10~40°cHumidity:<80%Trademark:HuayingTransport Package:Wooden CasesOrigin:China (Mainland) Description Pre:Circuit Breaker Analyzer with 12.1-Inch Touch Screen Next:Very Low Frequency Cable Tester