The lord of the ring mouse—a lightweight, ring-based computer mouse lasts over a month on a single charge

As the use of wearable devices such as augmented reality (AR) glasses has slowly but steadily increased, so too has the desire to control these devices in an easy and convenient way. Ring controllers worn on the finger already exist, but usually have some drawbacks in their size, weight or power consumption. Researchers, including those at the University of Tokyo, developed picoRing, an ultralow-power, ring-based wireless mouse to solve this problem. It uses a novel method to communicate with devices, giving it an incredibly long use period between charges.

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