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 "beeping" and a red fleshing lamp. Portable design, convenient and quick for use. Never needs re-calibration. High sensitivity. MIN/MAX data display and data hold function. Excellent reliability and high precision. Specifications: Calibration: 2450MHz Measurement Range: 0-9.99mW/cm2 Warning: 5mW/cm2 Accuracy: (+/-)1db Power Supply: 1 * 9V Battery (NOT Included) Item Size: 12.5 * 5 * 3cm / 4.92 * 1.97 * 1.18in Item Weight: 78g / 2.76oz Package Size: 16 * 8 * 5cm / 6.3 * 3.15 * 1.97in Package Weight: 137g / 4.85oz Package List: 1 * Microwave Leakage Detector 1 * Storage Bag 1 * User Manual (English)