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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 Round hole of EMF-390 near the USB port

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fofukutu Posted - 03/05/2019 : 21:18:15
There is a round hole on the side of EMF-390, right beside the mini USB port. It looks like a stereo jack, anyone knows what is it for?

Thanks!
5   L A T E S T    R E P L I E S    (Newest First)
EmfDev Posted - 03/08/2019 : 09:23:45
Yes we are working on it.
fofukutu Posted - 03/08/2019 : 00:03:15
Got it, thanks! It is probably helpful to add this info to the user guide.
EmfDev Posted - 03/07/2019 : 10:15:32
It's for earphones.
fofukutu Posted - 03/06/2019 : 18:38:44
Thanks for the reply. The hardware version shown on the PCB is 20190111, and the firmware version is 2.22.
EmfDev Posted - 03/06/2019 : 09:30:35
Hi fofukutu, may I ask what is the hardware version of your unit? you can see it in the PCB if you open the battery cover. You don't need to remove the battery. Also can you please provide your firmware version? it's under About->Revision in the menu. Thanks.

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