1. The electromagnetic radiation tester successfully tests the compatibility of electric field radiation and magnetic field radiation, and achieves the best test results 2. Test and understand the current state of electromagnetic radiation in indoor and outdoor environments 3. The product has a built-in electromagnetic radiation sensor, which is processed by a micro-control chip 4. LCD digital display radiation value 5. Reasonably handle or effectively avoid electromagnetic radiation and electromagnetic waves according to the test results. parameter: To measure the electric field: Range: 1V/m-1999V/m Alarm threshold: 40V/m Resolution: 1V/m To measure the magnetic field: Range: 0.01T-99.99T Alarm threshold: 0.4T Resolution: 0.01T measure temperature: Range: -10~70 Reading display: 3-1/2 digit LCD display Test bandwidth: 5Hz-3500MHz Sampling time: about 0.4 seconds Working temperature: 0~50 Working humidity: below 80% relative humidity Working voltage: DC4.5V Power supply: AAA1.5V*3PCS (not included) Weight: 125g EMF meter real-time measurement features: 1. machine is multi-purpose, and can detect electric field, magnetic field, bat radiation, temperature at the same time 2. Sound and light alarm, automatic alarm when the threshold is exceeded 3. Data lock, one key to lock the radiation value 4. LCD graphic display radiation value trend 5. Radiation assessment, intimately reminding whether the current radiation value is safe 6. Stylish appearance, one-handed operation, convenient for moving or measuring websites Size: 152 x 52 x 26.5mm Material: ABS colour: black Package Contents: 1 x Radiation Dosimeter 1 x English manul Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.