Nod is a plain black ring. It’s designed to be worn all day, but I’m not sure you would wear it all day. When wearing Nod, what most people won’t see is that the part on the inside of your hand doesn’t look like a ring at all, but rather a bumped-out flat surface. This is home to a touch panel as well as two tactile buttons, which give you some physical options in addition to the gesture-based controls.

https://www.linkedin.com/today/post/article/20140905020622-32095805-cool-stuff-nod-bluetooth-ring-control-the-world-with-one-finger?_mSplash=1