'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
“Battery-free, quiet, and inherently private” — These 3D-printed metal tags could be the future of home and office tracking as the tiny penny-sized discs turn ordinary objects into smart devices — ultrasonic tech does permanent maintenance-free monitoring without any need for charging
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Pro '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 News By Wayne Williams published 28 April 2026 The tags use ultrasonic sound to record everyday actions When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: Georgia Tech) Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Threads Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter Battery-free metal tags generate ultrasonic signals when objects move nearbyDifferent disk shapes create unique sound…
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