Wireless wearable mouse ‘picoRing’ runs one month on single charge

Researchers at the University of Tokyo have developed picoRing, a wireless, ultralow-power ring-shaped mouse designed to control augmented reality (AR) glasses more intuitively and efficiently. Weighing just 5 grams, picoRing can operate for over 30 days on a single charge by consuming between 30 and 500 microwatts of power—hundreds of times less than previous smart rings. This extended battery life is achieved through a novel semi-passive inductive telemetry (semi-PIT) communication system, which uses a wire coil with distributed capacitors to amplify magnetic fields and extend communication range without active power amplification. A wristband acts as a signal relay between the ring and the connected device, allowing the ring itself to use less power-intensive components. While picoRing offers promising improvements for wearable input devices, especially in AR and VR environments where traditional mice are impractical, it has limitations. The prototype is still somewhat bulky for a ring, experiences interference, and supports only simple inputs like scrolling