When it was time to switch to cordless keyboard and mouse, I picked out this combo from Logitech, a trusted brand for computer accessories. After about 10 minutes of hooking antenna into my pc, both received the signal in an instance and worked great. At least that's what I thought. Unfortunately the mouse kept acting up in a weird way, sometimes the cursor stopped moving unless I gave a hard tap on the mouse. Thought it was because of the batteries, I replaced them. The problem seemed resolved for a while then it came back to a point I had to bring back my regular mouse. The keyboard was no better, there was a delay from the time I typed to when the text actually showed up on screen. I gave up both to my brother after no luck trying frantically to fix them!