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Fitbit FB521GLBM view 1
Fitbit Sense 2 Advanced Health Smartwatch - Pale Gold
EE Model #: FB521GLBM
Manufacturer Model #: FB521GLBM-US
UPC/EAN: 810073611436

Fitbit Sense 2 Advanced Health Smartwatch - Pale Gold

EE Model #: FB521GLBM
Manufacturer Model #: FB521GLBM-US
UPC/EAN: 810073611436

$299.95 $199.95

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At a Glance

  • All-day Stress Detection
  • Stress Management Score
  • Sleep Profile
  • Sleep Stages & Sleep Score
  • Fitbit ECG App & Irregular Heart Rhythm Notifications
  • High & Low Heart Rate Notifications
  • Daily Readiness Score
  • Active Zone Minutes
  • Built-in GPS
  • 40+ Exercise Modes
  • Notifications
  • Calls From Your Wrist (Coming Soon)
  • Google Maps (Coming Soon)
  • Google Wallet (Coming Soon)
  • Built-in Voice Assistant
  • 6-month Fitbit Premium Membership

What's in the Box

  • Fitbit Sense 2 Advanced Health Smartwatch - Pale Gold
  • Documentation

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Product Description

Meet Sense 2—the smartwatch designed to help you stress less, sleep better & live healthier. Get help identifying stress and get the tools to better manage it. Learn more about your sleep and how to improve your rest with detailed nighttime tracking and a unique Sleep Profile. Track key heart-health indicators so you can make more informed wellness decisions. Plus Sense 2 is packed with advanced activity tracking and smartwatch features and includes 6 months of Fitbit Premium Membership. Fitbit is part of the Google family.

All-day Stress Detection

Recognize stressful events, manage them and move on with our new continuous EDA sensor on Sense 2. It helps detect stress events so you can start to see how and when your stress is triggered. Use of the cEDA sensor may affect battery life.

Stress Management Score

Get a handle on your stress. Higher score? You're showing fewer signs of stress. Lower score? Time to find better balance--try a meditation or go for a walk.

Sleep Profile

It's easier to get better sleep when you know what kind of sleeper you are. Find out whether your sleep mirrors a deep-sleep bear, a slow-to-sleep tortoise or one of our other Sleep Animals., then learn what habits best to support your profile.

Sleep Stages & Sleep Score

Learn about the quality of your previous night's sleep with a personalized Sleep Score. With Premium, see a breakdown of time in light, deep & REM sleep to see what's impacting your rest.

Fitbit ECG App & Irregular Heart Rhythm Notifications

There are two ways to uncover Afib, right at your fingertips. With the ECG app, you can take an assessment on demand. Plus, use irregular heart rhythm notifications to look for signs of Afib while you're still or sleeping.

High & Low Heart Rate Notifications

Your heart rate is a key indicator of health, so Sense 2 keeps you informed when it's above or below your set resting threshold.

Daily Readiness Score

Enhance yoru workout routine with a Daily Readiness score that reveals if you're ready to push or should focus on recovery.

Active Zone Minutes

Get the results you want from every workout. Active Zone Minutes uses your heart rate to guide you toward your desired intensity level--then helps you get there.

Built-in GPS

See you real-time pace & distance without your phone using built-in GPS during outdoor activity, then see a map of your workout route in the Fitbit app.

40+ Exercise Modes

Sense 2 tracks more exercises than ever--like skiing, golf, stand-up paddle boarding and more--and see all your stats in real time.


Get notifications for calls, texts, calendar events and apps like Gmail and Venmo--plus send quick replies and voice replies right from your wrist. Available when phone is nearby.

Calls From Your Wrist (Coming Soon)

Use the built-in mic and speaker to take Bluetooth calls hands-free, send callers to voicemail and adjust volume. Available when phone is nearby.

Google Maps (Coming Soon)

With Google Maps on your Fitbit watch, navigation is easier than ever. Explore a new route confidently with turn-by-turn directions on your wrist. Phone must be nearby.

Google Wallet (Coming Soon)

Tap your wrist to pay everywhere Google Pay is accepted. The quick, secure and contactless way to check out with your watch.

Built-in Voice Assistant

Use Amazon Alexa Built-in to get quick news and weather, set bedtime reminders and alarms, control your smart home devices and more--just by speaking to your watch.

6-month Fitbit Premium Membership

Get deeper insights and guidance, exclusive workouts, mindfulness sessions and more with the included 6-month Premium membership.

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Product Specifications

Sport Watch

Pale Gold

Sleep Tracking:

Heart Rate Monitor:

Water Resistant:


Manufacturer's Description

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