This microwave leakage detector can be used to verify any leakage from microwave ovens within a few minutes. Features: Digital LCD display with backlight, easy for reading. Leakage volume in dangerous zones will sound andquot beepingandquot and a red fleshing lamp. Portable design, convenient and quick for use. Never needs re-calibration. High sensitivity. MIN or MAX data display and data hold function. Excellent reliability and high precision. Specifications: Calibration: 2450MHz Measurement Range: 0-9.99mW or cm2 Warning: 5mW or cm2 Accuracy: ()1db Power Supply: 1 x 9V Battery (NOT Included) Item Size: 12.5 x 5 x 3cm or 4.92 x 1.97 x 1.18in Item Weight: 78g or 2.76oz Package Size: 16 x 8 x 5cm or 6.3 x 3.15 x 1.97in Package Weight: 137g or 4.85oz Package List: 1 x Microwave Leakage Detector 1 x Storage Bag 1 x User Manual (English)