Learn to manage stress & sleep better with our most advanced health & fitness smartwatch.
Understand stress, then minimize its effects Better sleep. Improved mood. More energy. Managing stress with Sense 2 can help you get there. Identify patterns of stress with all-day body-response tracking and smart notifications to remind you to reflect on your emotions. Try new ways of managing stress with guided breathing, exercise, meditations and more.
Better understand sleep through science Sense 2 helps you get the ZZZs of your dreams.
Tune in to your body Sense 2 helps illuminate changes in your wellness. Check your Health Metrics dashboard to see heart rate variability, skin temperature variation, SpO2 and more. You can also use 90 days of health trends to uncover changes to your well-being.
Everything starts with heart Use the ECG app for on-demand atrial fibrillation assessment or turn on irregular heart rhythm notifications to assess your heart while you're still or sleeping.§ Heart-rate tracking surfaces insights from your sleep, stress, activity and more while high & low heart rate notifications keep a close eye on your heart rate.
Shop Similar Products
Tech Specs
Technical Information
Sensor Type
Heart Rate Monitor
Pulse Oximeter Sensor
Functions
Phone
Push Notification
Sleep Monitor
Speaker
Text Messaging
Body Metrics Measured
Distance Traveled
Heart Rate
Pace
Sleep Quality
Stress
Network & Communication
Bluetooth
Yes
GPS
Yes
Battery Information
Maximum Battery Run Time
144 Hour
Physical Characteristics
Color Family
Dual Color
Product Color
Misty Blue
Soft Gold Aluminium
Height
0.4"
Width
1.6"
Weight (Approximate)
0.85 oz
Miscellaneous
Application/Usage
Golf
Health & Fitness
Skiing
Warranty
Limited Warranty
1 Year
General Information
Manufacturer
Google, Inc
Manufacturer Part Number
FB521GLBM-US
Brand Name
Fitbit
Product Line
Sense 2
Product Model
FB521
Product Name
Sense 2 FB521 Smart Watch
Marketing Information
Meet Sense 2-the smartwatch designed to help you stress less, sleep better & live healthier. Plus, continuous tracking of your heart & activity lets you track your overall wellness. Get on-the-go assistance with Google Wallet & Maps, and dive deep into your health & fitness with the included 6-month Premium membership.
Keep stress in check
Managing stress can lead to better sleep & more energy. Get smart reminders to reflect on signs of stress in your body with a new continuous EDA sensor while actively managing them with exercise, deep breathing & more.
Make sense of your sleep
Learn how to maximize rest with tools that track your sleep quality and pinpoint areas you can focus on improving. Premium gives you even more insights-see a personalized analysis of your sleep each month and get matched with a sleep animal that most closely mirrors your sleep style.
Watch your well-being
Track key health metrics like blood oxygen (SpO2) & heart rate variability to help illuminate changes in your wellness so you can adjust your routine to better support your health. You can even use the ECG app and irregular heart rhythm notifications to assess your heart for atrial fibrillation.
Product Type
Smart Watch
Reviews
About Ratings & Reviews are provided by verified users through email, My Account, or at events.
Compare Products ()
Add the products you would like to compare, and quickly determine which is best for your needs.
Add the products you would like to compare, and quickly determine which is best for your needs.
