Whether it is a wired mouse or a wireless mouse, there is a delay is certain, the difference is only in size.
According to the previous technology, relatively speaking, the delay will be slightly larger, and now the technology is developing very fast, now whether it is bandwidth or speed is very fast, the so-called delay has been felt, but it is best not to use a wireless mouse or keyboard to play some competitive games.
You can definitely feel it when you play a shooting game. Games like CS and CF can be played a few tenths of a second slower on wireless than on wired!