If you are looking for a professional handheld EMF meter, then your research is over here. That's because our product can meet your need. Adopted of solid material, practical and durable for long time use, not easy to get deformed and bring you much convenience. Features -Color:Black -Material:ABS -Size:15.00X5.50X3.00cm/5.89X2.16X1.18in -Power supply: 1 X 9V battery (not included) There are 5 LEDs, each representing a field strength range as follows: Dark Green - "normal" area - normal background magnetic field. 0 to 1. Green - "low" zone - low level magnetic field. 1.5 to 2. Yellow - "Warning" area - medium magnetic field. 2.5 to 10 Orange - "high" zone - high magnetic field. 10 to 20 Red - "Warning" zone - extremely high magnetic field. 20+ -The EMF tester tool is must-have for anyone concerned about the potential risks associated with electromagnetic radiation. -With its easy-to-use design, the magnetic field detector is perfect for both professionals and amateurs alike. -The magnetic field detector is a compact and lightweight device that can be easily carried in a pocket or bag, making it convenient for on-the-go use. -The emf meter is a cost-effective way to measure electromagnetic fields, providing readings without the need for massive equipment. -Simple in design, but very practical in use, which brings great convenience to you. Package list: 1 x meter