Features: This meter can test electric field radiation and magnetic field emission to reach the optimal-test result. It is used to test and learn electromagnetic radiation situation indoor and outdoor. Electromagnetic radiation monitors respond quickly to radiation and provide timely alarms in high-risk environments. The instrument is highly flexible and can measure environmental backgrounds. The detection value is-updated in real-time. Electromagnetic radiation detectors are small and portable. Permanently store-data in the event of a power outage. Beginners, seniors and advanced users can easily operate. The large LCD-screen of the electromagnetic radiation detector allows you to easily and quickly read real-time values. Widely used in single safety for protection-monitors and radioactive-indications, suitable for workers in the following fields: electromagnetic power-plants, accelerators, iron and steel-industries, chemical-industries, isotope-applications, industrial and-gamma non-destructive defect detection, Cobalt-source processing, gamma-radiation laboratories and environmental monitoring around nuclei. Equipped with a built-in electromagnetic radiation sensor, which can display the radiation value-on the clear LCD-digital display after processing by control micro-chips. Specifications: Material:ABS Size:Approx.16.7x6.5x3.7cm/6.57x2.55x1.45inch Power-supply mode: dry battery 9V 6F22 (shipped without battery by-default) Color: black+black sticker, black+red sticker, red+black sticker, red+red sticker. Package Includes: 1x Host 1x English User Manual note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.