a.Practical design. Slim appearance, easy to carry, with striped non- soft rubber at the handshake, it is convenient and comfortable to use. b.The combination of electromagnetic field measurement and electric field measurement. There is not only electromagnetic field radiation in life, but also electric field radiation that is overlooked. Both will cause great harm to the human body. Using this product can help you discover different radiation sources in time and protect .c.Wide electromagnetic field measurement range. The frequency range supported by this product is 5Hz-3500MHz. It can measure not only household appliances such as TV sets, refrigerators, fans, but also the radiation caused by high-frequency signals such as mobile phones and computers. Most of the products on the market can only measure 5Hz-300Hz, which is the frequency range of household appliances, such as and refrigerators.The frequency of high-frequency signals such as mobile phones is usually between 800 and 1800MHz, which is often undetectable. d.Various prompts for the intensity of the radiation.There is an LED light on the front of the sensor of the product. With the increase of the radiation intensity, it will change from green light to yellow light, red light, and the sound of the warning will also become more and more rapid, so that get the radiation intensity information without looking at the screen. And if you sometimes feel that the sound alarm is a little annoying, you can turn it off.e. measurement. Radiation is usually unstable and constantly changing, sometimes and sometimes small, it is difficult to determine the strength of the radiation. This product has a measurement function. If you want to know the time of maximum radiation in a period of time or the place of maximum radiation in the room, you can choose to enter the MAX mode, the product will capture the for your reference.color: Blackmaterial: plasticEMF measurement Range: 0.1-199.9mG / 0.01-19.99TResolution: 0.1mG / 0.01TAlarm threshold: More than 4.0mG / 0.4TElectric field measurement Range: 1-1999V/MResolution: 1V/MAlarm threshold: More than 40V/MAmbient Temperature Measurement Range: 0-50 / 32-122Resolution: 1 / Accuracy: 1.5 / 3Frequency range 5Hz-3500MHzAutomatic Shut-down 10 minutes of inactivityLow Battery Less than 6.8VEMF unit switch mG / TTemperature unit switch / Power "9V" battery (Not included)Operating Conditions 0-40 / 32-104 45%-80%RHPower Supply: 1 x 6F22 9V Battery (Not Included)Automatic Shutdown: No operation for 15 minutesOperating Environment: 0-40/32-104, 45%-80%RHFrequency Range: 5Hz-3500MHzMeasurement Range of Magnetic Field Intensity: 0.1-199.9mG / 0.01-19.99TResolution Ratio: 0.1mG / 0.01TAlarm Threshold: 4.0mG / 0.4TMeasurement Range of Electric Field Intensity: 1-1999V/MResolution Ratio: 1V/MAlarm Threshold: 40V/MMeasurement Range of Ambient Temperature: 050/ 32122Resolution Ratio: 1/Accuracy: 1.5/ 3Package Contents:1 x EMF meterOnly 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.