| CPC A61B 5/316 (2021.01) [A61B 5/0006 (2013.01); A61B 5/0015 (2013.01); A61B 5/002 (2013.01); A61B 5/0022 (2013.01); A61B 5/0245 (2013.01); A61B 5/25 (2021.01); A61B 5/327 (2021.01); A61B 5/332 (2021.01); A61B 5/333 (2021.01); A61B 5/339 (2021.01); A61B 5/349 (2021.01); A61B 5/6898 (2013.01); A61B 5/7225 (2013.01); G06Q 50/22 (2013.01); A61B 5/0205 (2013.01); A61B 5/7257 (2013.01); A61B 2560/0412 (2013.01)] | 20 Claims |

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1. An apparatus comprising:
a set of electrodes configured to sense heart-related electrical activity when in contact with skin of a user and produce electrocardiogram (ECG) waveforms representing the sensed heart-related electrical activity;
a processor configured to:
identify, using a machine learning model, the user based on the ECG waveforms;
convert the ECG waveforms to a signal that carries the ECG waveforms representing the sensed heart-related electrical activity; and
transmit the signal wirelessly to a computing device using a transmitter; and
a housing comprising a first layer and a second layer, wherein the set of electrodes, the processor, and the transmitter are all disposed between the first layer and the second layer of the housing, and wherein the housing has a packaging-label form factor.
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