GL-MT300N-V2 Mango Wifi bandwith

I don't understand why (and how) this router mentions a WI-FI up to 300 Mbps while it only uses the 2.4 Ghz band, what did I miss?

Hi

There is nothing unusual about this.
Wi-Fi 7 can even achieve physical layer speeds of over 1000 Mbps on the 2.4 GHz band.

For Mango, certain Wi-Fi parameters allowed it to reach 300 Mbps, as follows:

  • 802.11n
  • MIMO 2x2
  • Bandwidth: 40 MHz
  • Modulation: 64-QAM
  • Encoding: 5/6
  • Short GI

That is a very theoretical number. Real world numbers for this routers are much less.

Yes, this is the theoretical maximum rate at the Wi-Fi physical layer.
In practical scenarios, various factors such as interference, signal attenuation, and network congestion can reduce the actual throughput, which cause it significantly lower than the theoretical rate.