A smart ring is a computerized ring. The main feature of the smart ring is to serve as an NFC device, effectively eliminated the need to carry credit cards, door keys, car keys and potentially even ID cards or driver's licenses.[1][2] Other features include connection to the smartphone in order to notify the user of incoming calls, text, emails, and more; use as gesture-based controller, allowing the user to perform a variety of actions with a simple motion of your hand; and measure steps, distance, sleep, heart rate and track how many calories the user consumed.[3][4]
