BullettuPaandi
Disciple
This what I used to do for years; never had lag/connectivity issues. But recently switched to an ITX build and had to lose front panel USB connection to get fans in.Try connecting usb receiver on the front panel
There are 2 receivers for keyboard and mouse each. I bought just the keyboard long before I bought the mouse. I thought every Logitech mouse would work with the unifying USB, later got to know that this is not the case.If there are other 2.4Ghz devices or interferences then that'll also limit range