INDICATOR ALARM: 3 color indicators are used to remind whether the radiation level is safe. If the value is exceeded, there will be audible and visual alarms. 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. GOOD PERFORMANCE: The handheld electromagnetic radiation detector has wide detection range and high detection accuracy, applicable to more scenes. WITH BATTERY: Equipped with 3pcs AAA alkaline dry battery, which can be used after being installed and turned on to long term operation.Random exterior, 't accept the specified. Color: White Material: plastic Package Contents: 1 x Radiation Detector 3 x AAA alkaline dry battery 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.