Description [Making Life more Safe ComCompatible Witht]This EMF Tester can be used on testing PC, Laptop, TV, cell phone, microwave oven, refrigerator, telephone, WIFI router, cell towers, Compatible With all kinds of home appliances, and ghost hunting, etc.[One-hand operation Precise]Easy to operate and move Compatible With on-site measurements, effectively identify the magnetic field source and electric field source. Equipped with high quality built-in electromagnetic radiation sensor and micro-chip, making the test result more precise.[Auto sound light Alarm]When the testing result exceeds (Electric field Greater than 40 V/M and Magnetic field Greater than 0.4T or 4mG), it will trigger the sound light alarm of the EMF tester. And long pressing the middle button can turn on/off the sound alarm.[Multi-function]Large and back-light LCD makes it easy to read, rechargeable battery, average and peak value reading, data hold function, two units option, and temperature measurement. Auto power off after 5 minutes without operation.Material:plasticcolour:blackPackage Contents: 1 x EMF MeterOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.