Features INDICATOR 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. MULTIPLE FUNCTION: Electromagnetic radiation detector, simultaneously detecting RF strength, electric field strength and magnetic field strength. GOOD PERFORMANCE: The handheld electromagnetic radiation detector has wide detection range and high detection accuracy, applicable to more scenes. APPLICABLE SCENES: The radiation tester is widely used in household appliances and industrial equipments, high voltage equipments, offices, factories, etc. WITH BATTERY: Equipped with 3pcs 800mAh AAA alkaline dry battery, which can be used after being installed and turned on to ensure long term operation. Specification: Item Type: Radiation Detector Battery: 3 x 800mAh AAA alkaline dry battery (Included Battery) Test Range: RF Power Density: 0-99.999μw/c㎡ Electric Field Strength: 0-999.99v/m Magnetic Field Strength: 0-99.999μT Test Accuracy: RF Power Density: 0.001μw/c㎡ Electric Field Strength: 0.01v/m Magnetic Field Strength: 0.001μT RF Range: RF Power Density: 50MHz-5GHz Electric Field Strength: 20Hz-100MHz Magnetic Field Strength: 20Hz-1MHz Package List:1 x Radiation Detector 3 x Battery  Package List 1 x Radiation Detector 3 x Battery