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April 28, 2026

‘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 waynewilliams@onmail.com (Wayne Williams) | usagoldmines.com

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

This articles is written by : Nermeen Nabil Khear Abdelmalak

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