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Fitbit AltoHR

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What is the function on the round button on the charging cable plug at the USB interface?

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Hi @Straiton  if you press the button three times with a brief second between presses, it restarts your device. It has to be in the usb port while you do it. When you stop pressing the button, the screen goes blank and then the firmware version number of the Fitbit shows. Restarting is a good way to refresh the Fitbit. I do it to mine each time I charge it up.

Stepping in the U.S.A. since September 2013. Android 14

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Any thanks for the information.
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You can find the user manual here - click to go there - along with various articles, with illustrations.

Stepping in the U.S.A. since September 2013. Android 14

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