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Replying to @BigMac106

Yep, you take apart the F-91W & the Sensor Watch board just fits; it’s all screwdrivers and snap fit, except for one optional bit of soldering if you want the buzzer to beep.
NFC module: doesn’t exist yet! We have hopes but no guarantees. Discussion here: https://github.com/joeycastillo/Sensor-Watch/discussions/31#discussioncomment-1958228

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