Best AnswerWelcome to the forums @Adriannesworld
Your device will sync if it's within twenty feet of your dongle or mobile device.
Read this article on what to do when you've lost your device - click
The email is sent out at your request, when the battery is low.
Let us know what happens.
Best Answer
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@Adriannesworld A warm welcome to our Fitbit Community! My friend @Odyssey13 suggested great tips for you to locate your Fitbit One. In case you are still unable to locate it, my best advice is to contact our Customer Support team so they can help you further.
Keep me posted on the outcome my friend and I'll be around! ![]()