Seem a good price for the adapter A$28 at Amazon at the moment
AU warehouse stock
The USB wireless adapter is replacement for PS4, PS5 BT controller and Switch Pro, can set constantly launch, mapping and macros.
Features:
BT controllers supported only, 2.4g controllers are not supported.
Ultimate software is replacement for PS4, PS5 BT controller and Switch Pro only.
Support somatosensory vibration. Vibration support on X-input mode is replacement for PS4/PS5 controllers only.
Support multiple controllers platform conversion.
One-button connection, simple and quick, one-time pairing, multi-platform automatic recognition.
Adopt 2.1 BLE5.0 dual BT chips, more stable signal, zero delay, do not disconnect.
Compatible with the primary platform handles, two-player sparring, multiple people on the same screen.
Make the controller become Elite gamepad, which can set constantly launch, mapping and macros, 6 gears motor adjustment.
Can someone ELI5 purely for interests sake?