Features: EMF meter, so that the product measurement frequency up to 5HZ-3.5G, can cover most of the electronic product use issued by electromagnetic radiation and electromagnetic radiation. EMF detector can be used to detect induction cooker, refrigerator, TV; signal, cellphone, computer, wire tower and any other low frequency appliances or hunting, etc. This EMF meter tests electromagnetic field from 0.1 to 199.9mG. It detects electric field 1-1999V/M with 1V/M resolution and tests temperature 32-122℉. Equipped with LED indicator as an alarm. If less than 4.0mG radiation is detected, it will green, if 4-40mG is detected, it will be yellow, if the reading is more than 40mG, it will be red; and with sound alarm, the sound increases with the amount of radiation, you can also disable the sound by setting. This EMF meter has a variety of features including data hold and measurement, data lock, manual/automatic shut, safety value setting, and a large display of values with an visual system. Specifications: Material: Plastic Battery: 1200mAh(Included) Dose Rate: 0-1000μSv/h(10mSV/h) Electromagnetic Field: 0.1 to 199.9mG Electric Field: 1-1999V/M Resolution: 1V/M Temperature: 32-122℉ Size: Approx. 120x78x27mm/4.72x3.07x1.06in Package Includes: 1x Electromagnetic Radiation Detector note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.