Electronic Tattoos

[Jack]

What Is an Electronic Tattoo? | Built In

An electronic tattoo is a soft wearable device with integrated sensors that attaches to the wearer’s skin and transmits data wirelessly.

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"transmits data wirelessly"

 

[Jack]

From AI:

What Electronic Tattoos Can Do Now

Health Tracking: Measure heart rate, body temperature, and hydration levels.
Input Controls: Act as a temporary trackpad or button to change music or control devices.
Identification: Use NFC chips to share data or unlock personal devices.

Notice the last line.