I don't care about the glasses. The ring controller though - I have been looking for something like that for a while. I want something small and hands-free to

I don't care about the glasses. The ring controller though - I have been looking for something like that for a while. I want something small and hands-free to control the slides while giving presentations. I had a Creative Ring Presenter but it died and I just really need "next slide / previous slide" buttons.