It is 13 millimeters wide and 4 millimeters thick, waterproof with a monochrome LED screen. When connected with a smartphone via low power bluetooth, it displays online notifications. It can also be used as a remote control panel for many smartphone functions, like activating the camera, controlling music playback, etc. It is also anti-theft, allowing wearers to track their connected devices.
The ring sounds an alert if the person is more than 30 meters away from his or her phone. They recently completed a successful Indiegogo campaign. A promotional video only shows mocks of the ring, but they promise that a prototype will be soon ready. Among all features, this one seems the most impressive if it can be done: a rechargeable 22 milliampere-hour battery that lasts all day, weighing only a few grams. If the smart ring could be developed, it will be a smartphone or smartwatch killer.
We also recommend watching: "Samsung and Qualcomm: The Smartwatch Revolution to Replace the Smartphone" and "Chirp: Berkeley's Ultrasonic Gesture Recognizer".
Smarty Ring: A Smart Ring to Rule Them All