Features:      High sensitivity, wide measuring range, has a long service life.      Smaller body, larger screen, clearer measurement data and easier operation.      Radiation detector dosimeter for everyday use BR-9A help to avoid radiation hazrd in everyday life      With mute, alarm, particle sound selection button, test, mean value reset retest selection button, backlight can be turned on or off.      with USB charging port            Applications:      High frequency IF low frequency, magnetic field, power density, mobile phones, routers, microwave ovens, televisions, signal towers, desk lamps, substations, washing machines, refrigerators, computers, copiers, impressions, walkie-talkies, Bluetooth devices, transformers, troubleshooting, chargers, Mobile phone base station, high voltage electric tower, electric motor and other electrical equipment            Test range:      Power density: 0-99.999uw/cm2      Electric field strength: 0-999.99 v/m      Magnetic field strength: 0-99.999uT            Test accuracy:      Power density: 0.001uw/cm2      Electric field strength: 0.01v/m      Magnetic field strength: 0.001uT            Frequency Range:      50MHZ-5GHZ Power density      20HZ-100MHZ Electric field strength      20HZ-1MHZ Magnetic field strength            Specifications:      Power supply: 3 * 1.5V AA batteries or 1.2V rechargeable battery      Charging: USB 5V 2A input      Charging time: ≥4hours      Size: 105*70*30mm            Package included:      1 * BR-9A Electromagnetic Radiation Detector