A:AnswerFor the PS3, pair it by connecting it via usb cable.
(https://www.nacongaming.com/en-US/blog/ps5-controller-ps3)
For PS4, you will need to purchase a bluetooth adapter. I prefer 8 bit do for connecting the PS5 dualsense to my switch. I would think that it should also work with connecting a PS5 dualsense to a PS4.
You can also use Remote Play for PS4, but I world imagine that would be a lot of lag.
A:AnswerI am still paying around 90$ 80$ for a controller do not let little kids play with them or come in contact with water or liquid I should say on my 7th one now as of this day
A:AnswerIt helps identify the specific device and ensure it meets regulatory standards. Check the back of your controller for a label with the FCC ID information. If you find it, you can use that ID to look up more details about your controller online. Hope this helps!