1. Instantly respond to EMF fluctuations and spikes. Need 9 volt battery 2. Easy to read LED lights in the dark and in the sun 3. Portable, easy to use, rugged, reliable, super responsive 4. UV reactive color label 5. Used for ultra-normal wave research and general EMF testing Features:Test Gauss, keep you away from radiation, good for . 5-led indicator, representing different radiation values; easy to use. Apply 50/60Hz frequency monitoring. Dark green 0 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. Introdution: flowmeters are often used during and are also used for personal safety to identify potentially harmful high EMF radiation. The flowmeter is known for its reliability and quality in the investigation of paranormal phenomena. This makes the EMF instrument an excellent tool for detecting mental activity and finding potentially harmful high EMF levels in a home or work environment. Color:Orange Material:Metal+Plastic Size:14.3 cm x 2.9 cm x 5.3 cm Package Contents: 1 * Electromagnetic field detector Only 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.