One-handed operation and high sensitivity: one-hand operation, easy to move for on-site measurements, effectively identify the signal source and locate the signal position; Although Selavif EMF Detector is compact and light, it is still high sensitivity. Radiation rating is equipped with built-in magnetic radiation sensor to display the radiation value on the digital LCD screen after processing by control microchip AUTO SOUND-LIGHT ALARM, ONE TOUCH LOCK RADIATION: Selavif EMF Meter is built-in signal strength prompt speaker, and will sound-light alarm when the radiation data exceeds the safe range, the detector will flash red and warn the user via an alarm sound automatically; Long pressing the "beep" can turn off the sound. Data retention to lock Max/Average value with one key. It is a good helper to check if the place is radiation free DOUBLE READING IN LOW OR NON-LIGHT OPERATION: With large clear LCD screen display, two measurements could be easily seen even if in the dark or in the sun when the taillight function needs to be turned on; The EMF reader screen has large digit visual clarity and LCD display. Backlight can be easily switched on and off. Great tester for home, school, office, outdoor and ghost hunting. Measure both magnetic field radiation and electric field radiation clearly and accurately at the same time MAKE LIFE SAFE AND COMFORT: You cannot see, smell, taste, feel or hear electromagnetic fields (EMF), but make no mistake that they are there. Selavif EMF Meter friendly for fresh and advanced users. This meter is super intuitive and easy to use. Just get closer to the electromagnetic radiation source and test. Tip: For best results, stick close to tested devices. GREATER FREQUENCY RANGE: The measuring frequency range is larger up to 5HZ-3500MHz, resulting in more accurate measurement of daily household appliances: TV, mobile phones, computer, refrigerator, induction hob, electric wires, etc. It could also be applied to test the effect of anti-radiation clothing, radiation-resistant film and other preventive items; Widely used for Research and general EMF detection such as electromagnetic radiation control and test Specifications: Condition: 100% New Material: Plastic Measuring range: 1V/m-1999V/m Measuring object: electric field Measurement accuracy: 1V/m, 0.01ut Resolution: 0.4 seconds Size: Approximately. 130*60*25mm/5.1*2.4*1.0in Weight: Approximately. 146g/5.1oz Package list: 1.Radiation detector (battery not included) 1° Manual