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Features 1. Wide range of uses: The EMF meter helps measure electromagnetic fields, identify equipment that generates high radiation, and allows users to make decisions to limit exposure. Mainly used for testing TVs, computers, printers, microwave ovens, refrigerators, cell towers, low-frequency devices, ghost hunting, etc. 2. 5 LED indicator lights: Easy-to-read multi-segment LED display. Detectors are associated with positions, and according to reports, unexplained phenomena are related to radiation. This electromotive force detector has 5 LED indicator lights that can be read during the day or in the dark, making it easy to carry around as it can be placed in a pocket or handbag. 3. No charging required: The detector is powered by a single battery and reports EMF measurement results within a range of 5 milligauss. (Reminder - When the battery runs out, it must be replaced. Our Ghost Rice electromotive force detector does not support charging. First, use a screwdriver to unscrew the plastic cover. Then remove the battery and finally insert a new battery and tighten it again with a screwdriver.) 4. Accurate measurement: Measures various EMFs from 50 Hz to 20000 Hz and records a phone within 2 feet. 5. Protect your health: Measure electromagnetic field levels to prevent long-term overexposure to electromagnetic fields that can be harmful. You can use this electromagnetic field detector at home, in the office, etc. Specification 5-LED indicators, representing different radiation values 1 x 9V (including power supply) Use 50/60Hz frequency monitoring Dark green 0 1.5 milligauss; Green light from 1.5 to 2.5 milligauss; Yellow 2.5 to 10 milligauss; Orange 10 to 20 milligauss; Red 20+milligauss; Material: ABS Color: Black, White Size: 14.3 x 2.9 x 5.3 cm Weight: 100 g Package includes: 1x Host 1x Battery 1x English user manual