Feature 1Simple and efficient: Easy to use and fast measurement of electromagnetic radiation intensity around household appliances, wires and industrial equipment. 2Good Performance: The numerical contrast of the detector is obvious, suitable for measuring the effect of radiation protection products. 3Scope of Application: For environmental electromagnetic radiation testing. Measurement of radiation sources such as living rooms, offices, computer rooms, control rooms, cables, high voltage lines, monitors, etc. 4Instructions: Holding the instrument and slowly approaching the object to be measured until it comes into contact with it. The closer to the object to be measured, the greater the electromagnetic radiation value. 5Lightweight: This electromagnetic field tester only weights 192g / 6.77oz, it is very light that you can carry it effortlessly and use it anywhere and anytime.Item Type:EMF DetectorMaterial: ABSGross Weight: 192g / 6.77ozProduct Size: 13.5x7x3cm / 5.31x2.76x1.18inBattery: Matching 6F22 9V battery delivery capacity 800mAh . Package List1 x Detector1 x Manual1 x Battery