On the smartphone I do it via Bluetooth.
About Bluetooth, how else?
The earphones work with bluetooth, so the connection must be realized with it
either your lappi has a bluetooth module on board or you get a stick that can do it
Sorry, but how do I find that on screen?
Which operating system haste on the computer?
Then you should first clarify whether the laptop has a Bluetooth interface at all.
If so, you should next make sure that this is also activated (some laptops have a special button).
Step # 3 would be to start the used "Bluetooth Manager" (I assume you are using a Windows system, since I do not know much since version 7.0, that the icon is the "classic" Bluetooth logo [presumably ]) and connect the device.
Is it normal that the Internet does not work if I have connected the laptop via Bluetooth with the listeners?
Possible? Yes.
Normal? No.