Meet the Neyya Smart Ring: a Bluetooth ring that connects to your smartphone or PC/Mac computer to let you control your music, present your material, or take a selfie. Business professionals can use it to present their ideas with a tap and swipe. It is also possible to accept/reject notifications or use the ring to remind you to complete certain tasks.
The ring can be used with GoPro or Roku as well. The battery life lasts for up to 3 days. The companion app is available for iOS, Windows, and Android users. More information is available here.