Portable Electromagnetic Field Radiation Meter With LCD Backlight : Large LCD Display: Large LCD Display Application: This detector can use the combination of electric and magnetic field at the same time, allows you to get two important values in one test Dual alarm function: dual sound and light alarm function, automatically activated alarm, test value exceeding safety value Data retention function: you can turn on the "Power / HOLD" button briefly, and the reading will be blocked, and on the screen [HOLD], download again to resume the normal measurement, [HOLD] will not be displayed Portable size and easy do introduction: you can easily go one and only with each other in place The function that has been determined, the current rating value can be at the safety level, the three-color light indicating the actual magnetic field: safety, warning, reversal and electric field data are above Specification: Material: ABS Unit: Electric pole: V/m Magnetic pole: uT/ Precision: Electric pole: 1V/m Magnetic pole: 0,01uT/0,1mG ranges: Electric pole: 1-1999V/m Magnetic pole: 0,01 to 99,99 uT/0,1 to 999,9 Alarm threshold: Electric pole: 40V/m Magnetic pole: 0,4uT/4mG Width measurement: 5Hz-3500MHz sampling: about 0,4s maximum measuring range on LCD Operating temperature: 0-50C Operating humidity: relative note below 80% Voltage: 4,5 V Power supply: 3 AAA batteries (included) size: 130x64x27,5mm/5,12x2,52x1,08 inch contains: 1 electromagnetic radiation tester