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HomeTechnology'Battery-free, quiet, and inherently private' — These 3D-printed metal tags could change...

‘Battery-free, quiet, and inherently private’ — These 3D-printed metal tags could change home and office tracking, turning penny-sized discs into smart devices using ultrasonic tech for maintenance-free monitoring without charging

By Tribune Arab

April 28, 2026

Researchers at Georgia Tech develop battery-free 3D-printed metal tags for smart tracking that use ultrasonic sound to record everyday actions.

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