Using a large-size LCD screen, the values are clearly displayed on the screen, which is easy for you to read and gives you a better experience This detector detects both electric and magnetic field radiation for you, so you get two important values in one test Sound and light double alarm function, when the test value exceeds the safe value, it will automatically alarm Data hold function: You can short press the "power/hold" button, the reading will be locked, and the [hold] icon will be displayed on the screen, press it again to resume normal measurement, and the [hold] icon will not be displayed Portable and compact, easy to carry, easy to use with one hand, easy to carry The radiation assessment function can indicate whether the current radiation value is at a safe level, and 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 notify you Wide range of applications: the tester can be used for electromagnetic radiation monitoring in homes and apartments, offices, outdoors and industrial places, electromagnetic radiation testing for mobile phones, computers, TVs, refrigerators and high-voltage cables, radiation protection product testing, such as testing radiation protective clothing role, radiation protection film, etc. Specification: Model: ET925 Range: 1~1999V/m Material: ABS Reading display: 3-1/2 digit liquid crystal display Test frequency width: 5Hz ~ 3500MHz Sampling time: about 0.4 seconds Test mode: dual mode with test Overload prompt: LCD display range is the largest Working temperature: 0~50℃ Working humidity: less than 80% relative humidity Working voltage: 4.5V Power supply: 1.5V AAA battery*3 (not included) Size: 64*27.5*130mm