Using a large LCD screen, the values are clearly displayed on the screen, which is easier to read and has a better experience. This detector detects electric and magnetic field radiation for you, allowing you to obtain two important values in one test. Sound and light dual alarm function, when the detection value exceeds the safety value, it will automatically alarm. Data hold function: short press the "Power or HOLD" key, the reading is locked, the screen displays the [HOLD] icon, press it again to resume normal measurement, and the [HOLD] icon is not displayed. Small and portable, easy to carry, you can use it with one hand, carry it with you, and use it whenever you want. The radiation evaluation function can indicate whether the current radiation value is at a safe level. The three-color light indicates the current magnetic field status: safety, alarm, and avoidance. If the electric field data exceeds the safe state, the screen will turn red to remind you. Wide range of applications: The tester can be used for electromagnetic radiation monitoring in houses and apartments, offices, outdoor and industrial places, electromagnetic radiation testing of mobile phones, computers, TV sets, refrigerators and high-voltage cables, radiation protection product testing, etc. Anti-radiation effects such as clothing and anti-radiation films. Specifications: Material: ABS Unit: Electric Field: V or m Magnetic Field: uT or mG Accuracy: Electric Field: 1V or m Magnetic Field: 0.01uT or 0.1mG Range: Electric Field: 1-1999V or m Magnetic Field: 0.01- 99.99uT or 0.1-999.9 mG Alarm threshold: Electric field: 40V or m Magnetic field: 0.