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The GQ EMF-390 advanced multi-function digital EMF ELF meter is designed and developed by GQ Electronics USA. It is a portable and convenient device. It can be used in the general-purpose test detection and other scientific applications. Such as Power Line WiFi Cell phone 2G/3G/4G/5G Cell towerlow-medium band Microwave Smart Meter etc. The device integrated features include three-axis Electromagnetic Fields Electric Field Radio Frequencyup to 10Ghz and a bonus feature RF Spectrum Power Analyzerfive bands up to 2.504Ghz. The meter is able to identify/recognize the common source from EMF/RF measured such as Power Line WiFi/Cell phone Cell tower Microwave etc. It also comes with a built-in audible and visual alarm. It can be used for EMF ELF EF RF detection and monitoring both indoor and outdoor as well as in other similar environments. The EMF-390 has built-in flash memory for data logging it can log the real-time data every second with a timestamp. The history data can be be downloaded when the device linked to a PC. The free PC software can be downloaded from the manufacture website. The unique GQ RF Browser feature visualizes the RF radiation precisely on the screen. With RF Browser the user is able to see high-speed RF signals such as Smart meter cell phone transmission estimates Digital RF transmission data in bytes and RF power spectral histogram. The EMF-390 RF Browser is THE ultra-fast response RF detector. It can detect 5G signal as fast as 250nS nanosecond digital RF pulses. No worry about missing any RF pulses. All other same level meters in the market can only detect partial RF pulses and will always give false low RF readings. The meter has installed multiple sensors to ensure maximum scale/range measurement and highest accuracy. With open communication protocol the user is able to send commands to the unit to get all data remotely.