Feature 12 in 1 Detector: One machine with two functions, this detector can test electric and magnetic field radiation at the same time, easy to use and operate 2Safe Usage: When the test result exceeds the safe value, this electromagnetic field radiation monitor will automatically alarm 3Data Retention and Clear LCD Display: One key to lock the radiation value, easy to read the value, radiation evaluation can remind you whether the radiation value is safe 4High Accuracy Sensor: Equipped with built in electromagnetic radiation sensor, after being processed by the control microchip, the meter can display the radiation value clearly on LCD 5Application Range: Electromagnetic radiation detectors are mainly used in electrical appliances in life, which effectively helps people stay away from radiation sources and protects them from radiation hazardsItem Type:ElectromagneticFieldRadiationDetectorMaterial: ABSModel: ET825Electric Field: Accuracy: 1V/m-1999V/m Frequency Range: 5Hz-3500MHz Alarm Threshold: 40V/m Resolution: 1V/m Magnetic Field: Accuracy: 0.01T-99.99T Alarm Threshold: 0.4T Resolution: 0.01T Response Time: 0.4S Battery Model: 3 x 1.5V AAA battery (not included) . Package List1 x ElectromagneticFieldRadiationDetector1 x Manual