Omni cylindrical antenna

Hello guys my friend gifted me this device but i dont know its uses please explain

According to me its only a big anteena for router

Please guide properly

I would agree, the frequency range is however weird.

I assume it's for GSM/LTE/5G, concerning the frequency range.

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No idea what those frequencies are, but it sounds logical ...

If you're interested, you might take a look at:

and

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