Feature 1MULTIPLE FUNCTION: Electromagnetic radiation detector, simultaneously detecting RF strength, electric field strength and magnetic field strength. 2INDICATOR ALARM: 3 color indicators are used to remind whether the radiation level is safe. If the threshold value is exceeded, there will be audible and visual alarms. 3GOOD PERFORMANCE: The handheld electromagnetic radiation detector has wide detection range and high detection accuracy, applicable to more scenes. 4WITH BATTERY: Equipped with 3pcs 800mAh AAA alkaline dry battery, which can be used after being installed and turned on to ensure long term operation. 5APPLICABLE SCENES: The radiation tester is widely used in household appliances and industrial equipments, high voltage equipments, offices, factories, etc.Item Type: Radiation DetectorBattery: 3 x 800mAh AAA alkaline dry battery (Included Battery)Test Range:RF Power Density: 0-99.999w/cElectric Field Strength: 0-999.99v/mMagnetic Field Strength: 0-99.999TTest Accuracy:RF Power Density: 0.001w/cElectric Field Strength: 0.01v/mMagnetic Field Strength: 0.001TRF Range:RF Power Density: 50MHz-5GHzElectric Field Strength: 20Hz-100MHzMagnetic Field Strength: 20Hz-1MHz . Package List1 x Radiation Detector3 x Battery