GENERAL MLD290 Microwave Leakage Detector, 0-2 mW/cm2. More details: Microwave Leakage Detector, Ranges 0 to 2 mW/cm2, Accuracy +/-5 Percent, Frequency Range (Hz) 2.45 MHz, Monitors Microwave Radiation Leakage, Display Color Coded Scale, Features Wand Allows Leak Detection in Small Areas, Numeric and Colored Scales, No Battery Needed, Includes Detachable Probe