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. WITH BATTERY: Equipped with 3 x 800mAh AAA alkaline dry battery, which can be used after being installed and turned on to long term operation. 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. MULTIPLE FUNCTION: Electromagnetic radiation detector, simultaneously detecting RF strength, electric field strength and magnetic field strength. Product Item Type: Radiation Detector Battery: 3 x 800mAh AAA alkaline dry battery (Included Battery) Test Range: RF Power Density: 0-99.999w/c Electric Field Strength: 0-999.99v/m Magnetic Field Strength: 0-99.999T Test Accuracy: RF Power Density: 0.001w/c Electric Field Strength: 0.01v/m Magnetic Field Strength: 0.001T RF Range: RF Power Density: 50MHz-5GHz Electric Field Strength: 20Hz-100MHz Magnetic Field Strength: 20Hz-1MHz How to Use: Take out the product and turn on the switch Material: ABS colour: black Package Contents: 1 x Radiation Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.