to 20000 Hz. Equipped with 5 color indicator lights, different color representing to different radiation values. This radiation tester can be widely used in the home, office, outdoors, industrial sites, and the surrounding environment; It is also suitable for televisions, refrigerators, and notebook computers radiation detection. Shockproof Housing: The housing is made of plastics material that feels comfortable in the hand, wear resistant and impact resistant, can provide long service time. High Accuracy Sensor: Built-in high-precise magnetic field electric field sensors, micro-controlled chip processor can quickly and accurately measure the value of electromagnetic radiation. Easy Operation: One click lock radiation for easy movement with one hand. Suitable for the measurement of broadband electromagnetic fields from 50Hz to 20000 Hz. LED Indicators: Equipped with 5 color indicator lights, different color representing to different radiation values, allowing for a more accurate and graphical understanding of the current environment, easy to use. Wide Applications: This radiation tester can be widely used in the home, office, outdoors, industrial sites, and the surrounding environment; It is also suitable for televisions, refrigerators, and notebook computers radiation detection. Specifications: Material: ABS Battery: 1 * 9V 6F22 battery (included) Color: Black+Black sticker, Black+Red sticker, Red+Black sticker, Red+Red sticker (optional) Test ranges: 50Hz-20MGHz Accuracy: 5% Test frequency: 50/60Hz Working temperature: 18-49(0-120) Item size: 150 * 55 * 38mm / 5.91 * 2.17 * 1.50in Item weight: 99g / 3.50ounce Package size: 167 * 65 * 37mm / 6.57 * 2.56 * 1.97in Package weight: 100g / 3.53ounce Packing List: 1 * Radiation Detector 1 * Guideline