Fangrui Product Details 1. Bside K7 Handheld Electromagnetic Radiation Detector Electromagnetic Wave Tester 2. Digital Electromotive Force Meter Built-in 3 Electromagnetic Radiation Sensors 3. Measure The Radiation Of Electromagnetic Stove, Microwave Oven, Refrigerator, To Protect The Safety Of The Home 4. Buzzer Alarm Design, When The Test Results Exceed The Safety Value, The Instrument Will Automatically Alarm 5. With Flashlight, Can Also Work At Night 6. Internal Special Abs Material, Drop-proof And Durable 7. Parameters: 8. Resolution: Magnetic Field: 0.1mg0.01μt; Electrical Field: 1vm 9. Range: Magnetic Field: 0.1-199.9mg0.01-19.99μt; Electrical Field: 1-1999vm 10. Alarm Threshold: Magnetic Field: Greater Than 4mg0.4μt; Electrical Field: Greater Than 40vm 11. Frequency Response Range: Magnetic Field: 5hz-300hz; Electrical Field 4hz-3500mhz 12. Accuracy: About 15 Percent 13. Temperature Range: -20-60 Degrees Celsius 14. Sampling Time: About 0.4 Seconds 15. Low Voltage Indication: Less Than 6.8v 16. Operating Temperature: 0-40 Degrees Celsius 32-104 Degrees Fahrenheit 17. Operating Humidity: 45-80 Percent Rh 18. Power Supply: 3 X 1.5v Aaa Batteries (not Included In Shipment) 19. Size: 220mm X 60mm X 55mm 20. Weight: About 170g (without Battery)