Fangrui Product Details 1. Digital Electromagnetic High Frequency Radiation Environment Tester 2. Suitable For Home, Office, Outdoor, Industrial Environment; Used For High-voltage Line Radiation Detection Of Mobile Phones, Computers, Tvs, Refrigerators, Etc.; Test The Effect Of Protective Equipment Such As Radiation Protective Clothing And Radiation Protective Films 3. A Machine Can Realize Three Functions, Detect Electric Field, Magnetic Field Radiation And Temperature At The Same Time. Press The "mode" Key To Realize The Conversion Of Electric Fieldmagnetic Field And Temperature Functions. 4. When The Alarm Threshold Is Exceeded (electric Field: 40 Voltsmeter; Magnetic Field: 0.4 Microtesla), The Instrument Will Simultaneously Emit Sound, Light Up And Display The Screen Contents. 5. The Lcd Screen Can Display The Change Trend Of Radiation Value And The Radiation Evaluation Function Is Used To Remind You Whether The Current Radiation Value Is Safe. 6. During The Measurement Process, Press The "range" Key To Switch The Display Average Value, Max And Min In Turn. 7. Easy To Use, Easy To Operate With One Hand, Easy To Move Or Perform On-site Measurement 8. Size: 152x52x26.5mm 9. Note: Battery Not Included (aaa 1.5vx3)