Feature:1. High Accuracy Sensor: This radiation detector utilizes a high accuracy sensor and measurement technology to provide accurate measurement results.2. Easy To Operate: This radiation detector is very easy to operate, the user only needs to follow the instructions in the manual to start the measurement.3. Display Screen: This radiation detector has a display screen that shows the measurement results very intuitively, giving you a quick overview of the electromagnetic wave magnetic fields in your surroundings.4. Wide Application: This radiation detector has a wide range of applications and can be used in homes, offices, schools, hospitals or other public places.5. Excellent ABS Material: This radiation detector is made of excellent ABS material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life.Specification:Item Type: Digital Electromagnetic Field Radiation DetectorMaterial: ABSElectromagnetic Frequency Response Range: 5-300HzElectromagnetic Strength Range: 0.1-199.9mGResolution: 0.1mGAlarm Threshold: andgt 4.0mGAccuracy: 15 percent Electromagnetic Strength Range: 0.01-19. 99uTResolution: 0.01uTAlarm Threshold: 0.4uTAccuracy: 15 percent Electric Field Strength Frequency Response Range: 4Hz-3.5GHzElectric Field Strength Range: 1-1999V or MResolution: 1V or MAlarm Threshold: andgt 40V or MAccuracy: 15 percent Temperature Range: -20-60Accuracy: 2Power supply: 3 x 1.5V AAA Battery ( Shipped Without Battery ).Package List:1 x Digital Electromagnetic Field Radiation Detector1 x Manual