Humor will not be tolerated!! -Portia

I'm somewhat confused by Yellow's answer to this question. I admit that I'm not in school right now, but the last time that I used an iClicker they were radio based, not infrared. Has that changed?

I'm pretty sure that way back in the day when I used to be in classes like that (almost a decade ago!), they were infrared. But there have probably been a few different incarnations of them since then.