Electromagnetic Radiation Detector EMF Meter Tester(Black) 1. Wide range of detectable requency 2. Can detect the electromagnetic radiation everywhere 4. Easy operation,can detect the power of electromagnetic radiation around home electronics,electricty wire,industrial equipment and so on 5. For detecting environmental electromagnetic radiation: indoors,office,computer station room industrial control room,electricity wire,high voltage wire,monitor and so on which are the origin of radiation 6. For detecting hom electronics: cellphone,PC,TV Set copy machine,fax machine,AC,refregrator and so on 7. Requency range: 50Hz-2000MHz 8. Reacting time: 0.4S 9. Voltage: 9V 10. Battery: 1x6F229V(not included) 11. Size: 133x70x30mm