This article is about a ring that can be used to control some devices like smartphones, smarttvs, and other devices which uses internet. With this ring it’s possible to slide pictures, select videos and even play games only by moving the hand or some fingers. It is waterproof and uses bluetooth to connect with other devices. It is pretty interesting because you can control your devices without having a real controller.

http://mashable.com/2014/04/29/nod-bluetooth-ring/