Easy to use: the electric EMF meter has only one button, easy to use and can be operated by one hand, even if you are a beginner. Compact size and lightweight design also make it easy to put in your pocket or bag, convenient for carrying, so you can use it anytime and anywhere. [High Sensitivity] The EMF meter adopts premium material and advanced technology, with high sensitivity, and it can accurately measure wide spectrum EMF from 50 Hz to 20,000 Hz to prevent potentially harmful long-term overexposure to EMF. It's good for your health to keep you away from radiation. [Application] The portable EMF meter is often used for ghost hunting and measuring electromagnetic fields to identify devices that generate high radiation, and help users make decisions about limiting exposure suitable for industrial and construction applications.Battery drive: The electromagnetic field radiation detector is powered by 9V 6F22 dry battery, which can be used for a long time. Cordless design is more convenient to use without repeatedly arranging the power cable. The EMF tester is made of premium ABS material, strong and anti-ball, durable for a long time.