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I am considering to buy the Archer C7 AC1750.
I only have devices with 802.11n 2.4Ghz and NOT AC.
Therefore, I will use the antennas only for 2.4ghz.

In Archer C7 AC1750 specifications you mentioned that the external antennas are only for the 5Ghz, while the internal antennas are for 2.4Ghz.

My questions is: Are the 3 external antennas are also used for 2.4Ghz or only for 5 Ghz?
Is the C7 also have good range for only 2.4Ghz?
I am asking since I am afraid that if the only internal antennas are for 2.4Ghz my range performance in 802.11n will be relatively poor
And I need good range in 2.4Ghz.

Thanking in advance.