Electromagnetic Radiation Detector EMF Meter Radiation Dosimeter Monitor Tester BR-9AFeatures: High sensitivity, wide measuring range, long service life. Compact design with large screen for clear data display and easy operation. EMF detector for everyday use to help identify potential radiation sources in daily environments. Functions include mute, alarm, sound on/off, test, average value reset, retest, and adjustable backlight. Equipped with USB charging port.Applications: Measures electromagnetic fields from common household and office devices such as mobile phones, routers, microwave ovens, televisions, signal towers, desk lamps, power substations, washing machines, refrigerators, computers, copiers, printers, walkie-talkies, Bluetooth devices, transformers, chargers, cell phone base stations, high-voltage towers, electric motors, and other electrical equipment.Test Range: Power density: 099.999 W/cm Electric field strength: 0999.99 V/m Magnetic field strength: 099.999 TMeasurement Accuracy: Power density: 0.001 W/cm Electric field strength: 0.01 V/m Magnetic field strength: 0.001 TFrequency Range: 50 MHz5 GHz for power density 20 Hz100 MHz for electric field strength 20 Hz1 MHz for magnetic field strengthSpecifications: Power supply: 3 1.5V AA batteries or 1.2V rechargeable AA batteries Charging: USB 5V 2A input Charging time: Approximately 4 hours Dimensions: 105 70 30 mmPackage Included: 1 BR-9A Electromagnetic Radiation Detector