Silver Neyya smart ring. Now a collectible item as it is no longer sold.
The Neyya smart ring is basically a Bluetooth remote control for your computer, GoPro, Roku, or smartphone. Instead of tapping on a mouse, you tap on the ring on your finger. It also delivers notifications from your phone via vibration. It's a neat idea, especially if you want to cultivate an air of flashiness that an old-fashioned presentation remote doesn't provide