Color: Black - Material: Plastic - Quantity: 1 - Display screen: 2.0" LCD display - Power: 1 x 9V 6F22 battery (not included) - Test frequency: 50Hz~2000MHz - Time: About 0.4s - Working voltage: 9V - Max. reading: 1999 - For detecting environmental electromagnetic radiation: indoors office computer station room industrial control room electricity wire high voltage wire monitor and so on which are the origin of radiation - For detecting home electronics: cell phone PC TV set machine fax machine AC refrigerator and so on - Easy operation can detect the power of electromagnetic radiation around home electronics electricity wire industrial equipment and so on - Wide range of detectable frequency - Can detect the electromagnetic radiation everywhere - Portable - Comply with CE - The way to detect: - Switch on the device - Close the object slowly until contact with it the closer the distance is the stronger the power of electromagnetic radiation is - Remark: Don't closet to the object with high voltage - Change the angle during detecting until get the maximum data - When the object is power off the reading will be 0 unless there are other disturbing - Packing list: - 1 x Detector - 1 x 6F22 battery - 1 x Chinese and English user manual