Question about Logitech G G502 Lightspeed

Exactly, no Bluetooth. It is charged via Micro USB (plugged in at the front) and can still be used with the cable. When it is fully charged, the micro USB is plugged back into the wireless transmitter (Logiconnector).
I think the connection speed would be worse via USB, i.e. the mouse would be less precise, which is why the connector variant was chosen.

Top mouse! If Bluetooth is not a killer criterion for you, you will be very happy with it.

In my opinion, the G502 is one of the better mice. Before this mouse, I had more dead mice than our two cats brought home. - But the mouse has no Bluetooth. It connects to the Logiconnector via USB.