Using a large LCD screen, the values are clearly displayed on the screen, which is easier for you to read and gives you a better experience. This detector detects both 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/HOLD" key, the reading will be locked, the [HOLD] icon will be displayed on the screen, press it again to resume normal measurement, the [HOLD] icon will not be displayed. Small and portable, easy to carry, easy to use with one hand, take it with you wherever you want to use it. 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: safe, alarm, avoid, if the electric field data exceeds the safe status, the screen will turn red to remind you. Wide application: The tester can be used for electromagnetic radiation monitoring in houses and apartments, offices, outdoor and industrial sites, 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 film. Specifications: Material: ABS Unit: Electric field: V/m Magnetics field: uT/mG Accuracy: Electric field: 1V/m Magnetics field: 0.01uT/0.1mG ranges: Electric field: 1-1999V/m Magnetics field: 0.01-99.99uT/0.1-999.9mG Alarm threhold: Electric field: 40V/m Magnetics field: 0.4uT/4mG Measurement bandwidth: 5Hz-3500MHz Sampling time: about 0.4s Overload indication: max value of measurement ranges on LCD Operating temperature: 0-50 Operating humidity: relative humidity below 80% Working voltage: 4.5V Battery: 3 * AAA battery (INCLUDED) Package size: 130 * 64 * 27.5mm / 5.1 * 2.5 * 1.1in Package weight: 125g / 4.4ounce Packing list: 1 * Electromagnetic Radiation Tester