Making Life more Safe & ComfortThis EMF Tester can be used on testing PC, Laptop, TV, cell phone, microwave oven, refrigerator, telephone, WIFI router, cell towers, for all kinds of home appliances, and ghost hunting, etc 3-in-13-in-1 EMF meter, used to test magnetic field radiation (mG/T), electric field (V/m), and ambient temperature (C/F) Sound and Light AlarmWhen the detection result exceeds the safe value (0.4T (4mG) or 40V/m), an audible alarm will be issued and the green light will turn yellow. When the radiation reaches 40mG, the light will turn red and the sound alarm will be stronger Accurate MeasurementEquipped with a built-in electromagnetic radiation sensor, the tester provides accurate measurement and displays the radiation value on a clear LCD display Customer ServiceWe provide Two Years after sale service and lifetime technical support. Please feel free to contact us if you have any problem. Material: ABS Color: Black Power Supply: 1 * 6F22 9V Battery (Not Included) Automatic Shutdown: No operation for 15 minutes Operating Environment: 0-40/32-104, 45-80RH Frequency Range: 5Hz-3500MHz Measurement Range of Magnetic Field Intensity: 0.1-199.9mG / 0.01-19.99T Resolution Ratio: 0.1mG / 0.01T Alarm Threshold: > 4.0mG / > 0.4T Measurement Range of Electric Field Intensity: 1-1999V/M Resolution Ratio: 1V/M Alarm Threshold: > 40V/M Measurement Range of Ambient Temperature: 0?50/ 32?122 Resolution Ratio: 1/ Accuracy: 1.5/ 3 Item Size: Approx. 19.2*5.38*3.5cm / 7.56*2.12*1.38in Item Weight: Approx. 110g / 3.88oz Package Size: Approx. 23*8*5cm / 9.06*3.15*1.97in Package Weight: Approx. 200g / 7.05oPacking List: 1 * Electromagnetic (EMF Meter) 1 * Users Manual (English) 1 * Cloth Bag