Features: 1.Instantly respond to EMF fluctuations and spikes. Need 9 volt battery (preferably using Polaroid 9 volt battery).Special function 5-led indicator, representing different radiation values; easy to use; 1 x 9V (including power supply). 2.Easy to read LED lights in the dark and in the sun.Test Gauss, keep you away from radiation, good for your health. 3.Portable, easy to use, rugged, reliable, super responsive. 4.UV reactive color label.Apply 50 / 60Hz frequency monitoring.Dark green 0 to 1.5 milligauss; green light 1.5 to 2.5 milligauss; yellow 2.5 to 10 milligauss; orange 10 to 20 milligauss; red 20 + milligauss. 5.Used for ultra-normal wave research and general EMF testing.EMF flow meters are often used during ghost hunting and also for personal safety to identify potentially harmful high EMF radiation. The reliability and quality of EMF flow meters in paranormal investigations. This makes EMF meters a tool for detecting psychic activity and finding potentially harmful high EMF levels in the home or work environment. Specifications: Product Size:14.3*2.2*5.3cm Package Size:15*10.2*4cm Net weight:93g Package Weight:130g Color: black, blue Material: ABS Notes: 1.Due to the effects of light and shooting angle, the actual color of the item may differ slightly from the color shown on the picture. 2.Due to manual measurement,please allow 1-3cm measuring deviation.Thank you for understanding! includes: 1*EMF Meter 1*English User Manual