Description: This digital electromagnetic tester can detect both electric field and magnetic field,so you can have a clear knowledge of the environment harm level. The body of this electromagnetic radiation detector has bulge stripe which can increase the friction and allows you to firmly hold the device. This electromagnetic detector is easy to use with 3 button to control the power and other functions and the marks on each buttons can let you know their function easily. This electromagnetic tester use a large LCD screen to display the results and is easy to read by one glance. This tester use AAA battery to power which is convenient and the battery power level is shown on the screen to remind you when to change the battery. Specification: Material: Plastic. Color: Black. Size: 135*60*27mm. Battery: AAA battery.(Not included) Unit: V/M,μT. Precision: 1V/M,0.01μT. Range: 1-1999V/M,0.01-19.99μT. Alarm threshold value: 40V/M,0.4μT. Testing bandwidth: 5Hz-3500Mhz. Keep date: Yes. Low electricity prompt: Yes. Auto power-off: Yes. Note There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package included: 1* Tester.(Battery not included) 1* Manual.