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Your Fitbit’s serial number may be hidden beneath a removable band rather than printed on the visible back. The exact location depends on the model, so identify your device first and use the matching instructions below.
Quick answer: where to look
| Fitbit model | Serial-number location |
|---|---|
| Charge 6 | Inside the device beneath the bottom band, near the band connection |
| Charge 5 | Inside the device beneath the bottom band, near the band connection |
| Luxe | Inside the device beneath the bottom band, near the band connection |
| Sense 2 | Inside the device beneath the top band, near the band connection |
| Versa 4 | Inside the device beneath the top band, near the band connection |
| Inspire 3 | Near the band connection after releasing the band |
| Ace 3 | On the bottom of the tracker after removing it from the band |
| Google Fitbit Air | On the side of the tracker after removing it from the band |
| Aria Air | At the top of the underside label, above the barcode |
| Fitbit Ace LTE | In Settings, beneath the top band bar, or in the Fitbit Ace app |
These locations follow Google’s current device serial-number guide. Do not assume that every Fitbit has its serial number on the back.
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Find the serial number by model
Fitbit Charge 6
- Turn the tracker over.
- Press the flat band-release button toward the band with a fingernail.
- Gently pull the bottom band away from the tracker.
- Read the serial number inside the device near the band connection.
- Press the band back into place until it clicks securely.
Fitbit Charge 5
- Turn the tracker over.
- Press the flat latch button toward the band.
- Gently remove the bottom band.
- Look inside near the band connection for the serial number.
- Snap the band back into place.
Fitbit Luxe
- Turn the tracker over and locate the band latches.
- Press the flat release button toward the band.
- Pull the bottom band away gently.
- Read the serial number inside near the connection.
- Reattach the band firmly.
Fitbit Sense 2 and Versa 4
For both watches, the serial number is beneath the top band, not the bottom band.
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- Turn the watch over.
- Slide the flat release button toward the band.
- Gently pull the top band away from the watch.
- Read the serial number inside near the band connection.
- Reattach the band until it snaps into place.
Fitbit Inspire 3
- Turn the tracker over.
- Press the quick-release lever inward.
- Gently pull the band away from the tracker.
- Read the serial number near the band connection.
- To reinstall the band, seat one end of the pin in its notch, press the lever, slide the other end into position, and release the lever once both ends are seated.
Fitbit Ace 3
- Hold the tracker with the screen facing you.
- Gently push the top of the tracker through the opening on the back of its band.
- Read the serial number on the bottom of the device.
Google Fitbit Air
- Remove the tracker from its band.
- Check the side of the device.
- Look for the 14-character alphanumeric serial number near the country-of-manufacture information.
Fitbit Aria Air
- Turn the scale over.
- Find the label near the battery door.
- Read the serial number at the top of the label, above the barcode.
Fitbit Ace LTE
You have three official options:
- On the watch: Press and hold the top button, open Settings > System > About, then swipe down to view the serial numbers.
- On the watch body: Remove the band from the top bar and read the serial numbers etched inside the bar.
- In the Fitbit Ace app: Open the app, open the child’s card, select Settings > Device, and find the number at the bottom of the device information list. Tap it to copy it.
Identify your Fitbit model first
The model matters because the release direction and band location differ. If you are unsure which device you have:
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- 【All-day Activity Tracker】: ENGERWALL IP68 Waterproof fitness tracker can record and track your daily steps, calories burned, exercise distance and time. It can also monitor your Body Temp, Heart Rate, Blood Oxygen and Blood Pressure. IP68 waterproof ensures that you don't need to take it off for daily hand washing and swimming, but don't soak it in water for a long time or wear it for hot baths, saunas.
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- Check the connected device name in the Fitbit app or the app currently used to manage your Fitbit.
- Compare the screen, buttons, case shape, and band design.
- Check the original box, receipt, or order record.
- Use the Fitbit help center to compare product and setup resources.
Serial number versus other identifiers
| Identifier | What it identifies |
|---|---|
| Serial number | One specific physical device |
| Model name | A product family, such as Charge 6 or Versa 4 |
| Model or regulatory number | A product, certification, or regulatory designation |
| SKU or order number | A retail item or purchase record |
| Bluetooth name | The name shown when pairing the device |
Copy the complete serial-number string exactly, including every letter and digit. Small printing can make 0 look like O, or 1 look like I. A barcode number is not automatically the serial number; look for labels such as S/N or Serial Number. Serial-number formats also vary by product and generation, so do not assume every Fitbit uses the same character count.
If you cannot read or find it
- Print is too small: Use bright, indirect light and photograph the label with your phone, then enlarge the image.
- Surface is dirty: Clean only the exterior with a soft, dry cloth. Do not use liquid inside the band connection or case.
- The band will not release: Confirm the model, use a fingernail, and press or slide the latch in the correct direction. Do not twist the tracker, force the band sideways, or pry with metal. Stop if the latch looks damaged.
- The device will not turn on: Check the physical location, the underside or side of the tracker, the original box, and your receipt or order record. The app is not a guaranteed source for every Fitbit model; current official instructions specifically document in-app access for Ace LTE.
- The box and device do not match: The box may belong to another unit, the device may have been exchanged or replaced, or you may be reading a model number rather than a serial number. Photograph both identifiers and ask Google/Fitbit support which one should be used.
- The model is older or not listed: Check its packaging and labels, then contact Google/Fitbit support. Older community posts mention account-based or URL-based identifiers, but those reports are historical or anecdotal and should not be treated as a current universal method.
Why the serial number may be requested
Support, warranty, repair, replacement, return, insurance, retailer-service, registration, and resale paperwork may ask for the serial number. It identifies a particular unit, but by itself it may not prove legal ownership. Support may sometimes use account or purchase details instead, although that is not a guaranteed procedure.
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- Fitbit Charge 6 tracks key metrics from calories and Active Zone Minutes to Daily Readiness and sleep; move more with 40+ exercise modes, built-in GPS, all-day activity tracking, 24/7 heart rate, automatic exercising tracking, and more[1]
- See your heart rate in real time: Just link your Charge 6 to compatible exercise machines, like treadmills, ellipticals, and more[2]; and stay connected with YouTube Music controls[3]
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- Run your routine with Google essentials: Find your way seamlessly during runs or rides with turn-by-turn directions from Google Maps on Fitbit Charge 6; and when you need a snack break on the go, just tap to pay with Google Wallet[1,4]
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Keep it private
Store the number in a private notes file, password manager, or warranty record alongside the model, purchase date, receipt, and warranty details. Share it only with Google/Fitbit, a retailer, insurer, or another trusted service that legitimately needs it. If you post a troubleshooting photo publicly, redact the full serial number.
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Quick Recap
Bestseller No. 1
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Google Fitbit Inspire 3 - Midnight Zen/Black - Small and Large Bands
- Inspire 3 is the tracker that helps you find your energy, do what you love and feel your best – all you have to do is wear it;
- Compatible with Apple iOS 16.4 or higher and Android OS 11.0 or higher
- Move more: Stay motivated with a Daily Readiness Score, Active Zone Minutes, all-day activity tracking and 24/7 heart rate, 40+ exercise modes, automatic exercise tracking, and reminders to move
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- 【All-day Health Monitor】The fitness tracker watch will automatically track your real-time heart rate, blood pressure and blood oxygen throughout the day to help you better understand your health. Equipped with a high-performance chipset, the fitness tracker automatically analyzes your overall sleep quality (deep/light/wake time) at night and gives you a nightly sleep score in the app to help you adjust your lifestyle and make you healthier.
- 【Smart Notification Remider】 With Bluetooth connection to your phone, it can support incoming calls/text alerts/APP message notifications (WhatsApp/Facebook/Instagram etc.), you will never miss your important messages. With the fitness watch, you can also perform sedentary reminder, water reminder, alarm clock, stopwatch, remote control photo, find devices, etc. to make your life healthier and smarter.
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- 【Long Battery Life】The fitness watch uses magnetic fast charging to provide a better battery life experience. It takes 1-2 hours to fully charge and can be used for up to 7 days of regular use and 15 days of standby. Compatible mobile phone system: android5.0 (inclusive) and IOS9.0 (inclusive) or above.
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Google Fitbit Air - Screenless Activity Tracker, Obsidian
- Google Fitbit Air is the unbelievably comfortable, exceptionally smart way to transform your health[1]; and Google Health brings together effortless tracking and adaptive coaching to help make the most of your everyday[2]
- Unlock more with Google Health Premium: With a premium membership, get personalized coaching that’s built with Gemini and adapts to your life[2]; get a 3-month trial at no cost to you[5] (Google Health Premium subscription sold separately)
- Comfortable fit - One Size Tracker (130-210 mm): The lightweight, micro-adjustable fit sits comfortably and quietly, so you can wear Google Fitbit Air through work, play, and sleep; advanced sensors and new algorithms power more accurate, precise health tracking, 24/7[1]
- Designed for every occasion: With no screen to distract you or disrupt your style, your tracker moves seamlessly from bracelet to workout band to sleep band, and you can change looks in seconds – just press the pebble in, click, and go
- Long battery life: Google Fitbit Air’s battery lasts up to a week, and fast charging gets you one day of battery life in just five minutes[6,7]
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
