You use WiFi.

Almost everyone does.

It typically operates on 2 different bands

2.4 GHz & 5 GHz

2.4 GHz = Longer range, slower speeds

5 GHz = Shorter range, faster speeds

When you setup your WiFi,

Both bands are TURNED ON by default.

That's why you see 2 WiFi names,

One with the name & the other one with 5G

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

Both WiFi bands are on = MORE RF radiation

You don’t need both.

Turn one off.