This article explains how to use a PS5 DualSense controller on PS4. Bluetooth Adapters, PS4, and DualSense The PS5 controller doesn't just work with the PS4, so you must pick up a Bluetooth adapter.

Bluetooth accessories are useful because they provide a liberation from wires and and the devices with which they connect. This controller, however, has rotating handles to help lock in your ...

Google Stadia celebrates shutdown with controller update, new game The Stadia controller is getting an update with generic Bluetooth support.

Yet as [Gary] found out, all this website does is flash a firmware file via WebUSB and WebHID over the original Stadia firmware with a generic Bluetooth controller firmware image.

Customers still owning Stadia joypads need to convert them into proper Bluetooth controllers, or they will lose the ability to keep using the devices in the future.