This is the most reliable microwave leakage detector. It can be used to verify any leakage from microwave ovens within a few minutes. It is featured with large LCD and leakage volume in dangerous zones will sound “beeping” and a red flashing lamp. When there is excessive microwave leakage from the microwave ovens, the unit will be automatically alarmed and flash to effectively test the microwave leak. In addition, this microwave leak detector calibrated in the factory and never need re-calibration.