You use WiFi.

Almost everyone does.

It typically operates on 2 bands.

2.4GHz & 5GHz

2.4 GHz = Longer range but slower speeds

5 GHz = Shorter range but faster speeds

When you setup your WiFi,

Both bands are TURNED ON by default.

That's why you see 2 WiFi names,

One ending with 2.4G & the other one with 5G

(This 5G has nothing to do with the wireless 5G on your phone)

Both WiFi bands are on = Double the radiation

You don't need that.

Turn it off.