Fitbit Sense 2 Digital Touchscreen Black GPS (satellite)

SKU
FB521BKGB
Login for pricing
Fitbit Sense 2 Shadow Grey/Graphite
  • Manage stress
  • Improve sleep
  • Focus on heart health
  • Work out smarter
  • Help from Google
More Information
Display type Digital
Built-in speaker(s) Yes
Touchscreen Yes
Bluetooth version 5.0
SKU FB521BKGB
EAN 0810038858364
Manufacturer Fitbit
Availability In Stock
Understand stress with all-day body response tracking.

Understand stress with all-day body response tracking.

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.

Sleep Profile and Sleep Score give insights for better sleep.

Sleep Profile and Sleep Score give insights for better sleep.

Sleep Profile breaks down your sleep data each month and pinpoints how you can improve sleep based on 10 key sleep metrics.

Check your Sleep Score to learn about the quality of your previous night's sleep, and get a breakdown of time in light, deep, and REM sleep with Fitbit Premium.

Focus on your heart with the ECG app and heart rate tracking.

Focus on your heart with the ECG app and heart rate tracking.

Use the ECG app for on-demand atrial fibrillation assessment or turn on irregular heart rhythm notifications to assess your heart rhythm while you're still or sleeping.

Heart rate tracking surfaces insights from your sleep, stress, activity, and more while high and low heart rate notifications keep a close eye on your heart.

Get more out of your workouts.

Get more out of your workouts.

Your Daily Readiness Score analyzes recent activity, sleep, and heart rate variability. Maybe you’re signed up for a HIIT class but change plans after seeing your score – Fitbit Premium serves up a yoga flow for you.

Help from Google Maps and Google Wallet.

Help from Google Maps and Google Wallet.

Reach your destinations easier with turn-by-turn directions from Google Maps.5 Make speedy, secure checkouts from your wrist with Google Wallet.

Level up your fitness routine

Level up your fitness routine

Fitbit Premium helps you get more out of your workouts with a Daily Readiness Score that lets you know what your body's capable of. Explore a library of energizing workouts, de-stress with mindfulness sessions and get motivated with content from leading fitness brands.

Style & comfort

Style & comfort

Sense 2 is sleek and slim with raised band attachments that make it more comfortable for all-day wear. The modern design complements styles ranging from funky to formal.

Smart info on the go

Smart info on the go

Get notifications from your phone, pay for retail items4, use the built-in voice assistant and send quick replies and voice replies right from your wrist.

Battery for 6+ days

Battery for 6+ days

Sense 2 tracks all your health & fitness stats for 6+ days without having to stop for a charge. Plus get a full day's charge in just 12 minutes.

Display your way

Display your way

Choose from hundreds of clock face designs and store up to 5 favorites right on your wrist.

Easily pay hands-free

Easily pay hands-free

Pay from your wrist at retail stores or transit stations that accept contactless payments.

Ask your voice assistant

Ask your voice assistant

Use Amazon Alexa Built-in to ask your Fitbit smartwatch questions, set alarms, check the weather and more.

The app has it all

The app has it all

See your stats, trends and all your progress in one place with the Fitbit app—plus access your Premium membership for personalized guidance.

Menstrual health tracking

Menstrual health tracking

Log periods, symptoms and more with menstrual health tracking in the Fitbit app.

Understand stress with all-day body response tracking.
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.

Sleep Profile and Sleep Score give insights for better sleep.
Sleep Profile9 breaks down your sleep data each month and pinpoints how you can improve sleep based on 10 key sleep metrics.

Check your Sleep Score to learn about the quality of your previous night's sleep, and get a breakdown of time in light, deep, and REM sleep with Fitbit Premium.2

Focus on your heart with the ECG app and heart rate tracking.
Use the ECG app for on-demand atrial fibrillation assessment or turn on irregular heart rhythm notifications to assess your heart rhythm while you're still or sleeping.3

Heart rate tracking surfaces insights from your sleep, stress, activity, and more while high and low heart rate notifications keep a close eye on your heart.

Get more out of your workouts.
Your Daily Readiness Score analyzes recent activity, sleep, and heart rate variability. Maybe you’re signed up for a HIIT class but change plans after seeing your score – Fitbit Premium serves up a yoga flow for you.2

Help from Google Maps and Google Wallet.
Reach your destinations easier with turn-by-turn directions from Google Maps.5 Make speedy, secure checkouts from your wrist with Google Wallet.4
Features
Waterproof up to50 m
Heart rate monitorYes
Ambient light sensorYes
ThermometerYes
AltimeterYes
Built-in cameraNo
Vibrating motorYes
FM radioNo
Mobile operating systems supportedAndroid, iOS
Operating system installedFitbit OS
Built-in microphoneYes
TouchscreenYes
Built-in speaker(s)Yes
Short Message Service (SMS)Yes
Display typeDigital
AccelerometerYes
Quality of sleepYes
Virtual assistantAmazon Alexa
Smart notificationsYes
Answerphone remote accessYes
Activity trackerYes
Heart rate sensor typeOptical
Distance travelledYes
Calories burnedYes
SMS notificationsYes
Vibrating alarm clockYes
Blood pressure monitorYes
Country of originUnited Kingdom
Always-on displayYes
Blood oxygen sensorYes
Skin temperature sensorYes
Workout trackingYes
Find my phone functionYes
Call notificationsYes
Automatic daily activity detectionYes
Alarm clockYes
Advanced workoutsYes
Technical details
Heart rate monitorYes
Ambient light sensorYes
ThermometerYes
AltimeterYes
Waterproof up to50 m
Product colourBlack
Built-in cameraNo
Watch glass typeCorning Gorilla Glass 3
Vibrating motorYes
FM radioNo
Protection featuresWater resistant
ShapeSquare
Band colourBlack
Mobile operating systems supportedAndroid, iOS
Operating system installedFitbit OS
Built-in microphoneYes
TouchscreenYes
Built-in speaker(s)Yes
Short Message Service (SMS)Yes
Display typeDigital
AccelerometerYes
Quality of sleepYes
Virtual assistantAmazon Alexa
Smart notificationsYes
Answerphone remote accessYes
Display
Watch glass typeCorning Gorilla Glass 3
TouchscreenYes
Display typeDigital
Always-on displayYes
Colour displayYes
Design
Market positioningSmartwatch
Watch case colourBlack
Watch case materialAluminium
Band sizeS/L
Wrist size range129 - 209 mm
Waterproof up to50 m
Product colourBlack
Protection featuresWater resistant
ShapeSquare
Band colourBlack
Closure typeSingle prong strap buckle
Maximum strap length20.9 cm
Suggested genderUnisex
Minimum strap length12.9 cm
WaterproofYes
Watch glass typeCorning Gorilla Glass 3
Performance
Built-in cameraNo
FM radioNo
Mobile operating systems supportedAndroid, iOS
Operating system installedFitbit OS
Built-in microphoneYes
Built-in speaker(s)Yes
Network
GLONASSYes
GPS (satellite)Yes
Mobile network connectionNo
Ports & interfaces
USB portNo
Near Field Communication (NFC)Yes
BluetoothYes
Wi-FiNo
Bluetooth version5.0
Headphone connectivityBluetooth
Bluetooth Low Energy (BLE)Yes
Power
Charging time2 h
Battery technologyLithium Polymer (LiPo)
Battery life (max)144 h
Battery life (GPS mode)5 h
Battery typeBuilt-in battery
Battery life6 day(s)
Battery life144 h
Operational conditions
Operating temperature (T-T)-10 - 45 °C
GPS Performance
GLONASSYes
GPS (satellite)Yes
Other features
Product colourBlack
BluetoothYes
Protection featuresWater resistant
Weight & dimensions
Width91 mm
Depth176 mm
Thickness6.6 cm
Weight200 g
Packaging data
Package width194 mm
Package depth219 mm
Package height369 mm
Packaging content
Charging baseYes
ChargerYes
Logistics data
Harmonized System (HS) code8517620000

You may also be interested in

Compare Products
Product Fitbit Sense 2 Digital Touchscreen Black GPS (satellite)
Bestseller
Fitbit Sense 2 Digital Touchscreen Bla... Login for pricing
ASUS VivoWatch SP (HC-A05) 3.05 cm (1.2") LCD Black GPS (satellite) ASUS VivoWatch SP (HC-A05) 3.05 cm (1.... Login for pricing
Fitbit Versa 4 Digital Touchscreen Platinum GPS (satellite) Fitbit Versa 4 Digital Touchscreen Pla... Login for pricing
Fitbit Sense 2 Digital Touchscreen Aluminium GPS (satellite) Fitbit Sense 2 Digital Touchscreen Alu... Login for pricing
Fitbit Sense 2 Digital Touchscreen Gold GPS (satellite) Fitbit Sense 2 Digital Touchscreen Gol... Login for pricing
Fitbit Versa 4 Digital Touchscreen Rose GPS (satellite)
Hot Product
Fitbit Versa 4 Digital Touchscreen Ros... Login for pricing
SKU
FB521BKGB
90HC00D1-MWP0E0
FB523SRAG
FB521SRWT
FB521GLBM
FB523RGRW
Description
Understand stress with all-day body response tracking.
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.

Sleep Profile and Sleep Score give insights for better sleep.
Sleep Profile9 breaks down your sleep data each month and pinpoints how you can improve sleep based on 10 key sleep metrics.

Check your Sleep Score to learn about the quality of your previous night's sleep, and get a breakdown of time in light, deep, and REM sleep with Fitbit Premium.2

Focus on your heart with the ECG app and heart rate tracking.
Use the ECG app for on-demand atrial fibrillation assessment or turn on irregular heart rhythm notifications to assess your heart rhythm while you're still or sleeping.3

Heart rate tracking surfaces insights from your sleep, stress, activity, and more while high and low heart rate notifications keep a close eye on your heart.

Get more out of your workouts.
Your Daily Readiness Score analyzes recent activity, sleep, and heart rate variability. Maybe you’re signed up for a HIIT class but change plans after seeing your score – Fitbit Premium serves up a yoga flow for you.2

Help from Google Maps and Google Wallet.
Reach your destinations easier with turn-by-turn directions from Google Maps.5 Make speedy, secure checkouts from your wrist with Google Wallet.4
Your health, in harmony ASUS VivoWatch SP is an intelligent wearable health tracker that offers 24/7 health and fitness monitoring and insights to help you maintain a healthy lifestyle and achieve fitness goals. Together with the ASUS HealthConnect app, you can track blood pressure, heart rate, exercise, sleep and a variety of other health categories in an intuitive and easy way. Exclusive ASUS HealthAI technology then provides personalized health-management tips based on health measurements, manual recording and personal habits. Stylish and durable, with up to 14-day battery life and a swim-proof design, VivoWatch SP is designed to be a 24/7 health companion that goes anywhere. It accepts standard watch bands and features a variety of changeable faces, giving you a powerful health companion that reflects your individual style. Exercise heart rate and pulse transit time (PTT) VivoWatch SP features a pair of electricalgraphy (ECG) and photoplethysmography (PPG) sensors, enabling it to calculate pulse transit time (PTT) as well as measure heart rate, sleep and activity and stress levels throughout the day, giving you a variety of insights for better health management. Body Harmony Index With its ECG sensor, VivoWatch SP measures your body's sympathetic and parasympathetic response and calculates a Vitality Index and Relax Index in just one minute. The Vitality Index is a score of your resiliency to stress, while the Relax Index is a score of your current relaxation or stress level. The two scores are then used to calculate a Body Harmony Index that gives you an easy to understand view of your body's overall stress response. Automatic health measurements You can set VivoWatch SP to perform automatic pulse transit time (PTT) measurements at regular intervals and receive notifications of the results, giving you an easy and convenient way to stay informed about your health. Smart health-management tools Medication tracking and reminders Enter your medicine schedule in the ASUS HealthConnect app, and VivoWatch SP will remind you when it’s time to take each medication, helping you to keep a regular schedule and never miss a dose. Health data and personalized analysis sharing Share selected health data with your family, doctor or anyone you choose, securely and easily. This long-term information may offer additional insights over individual blood-pressure measurements done at a clinic. Cloud data storage Back up your health data to the cloud and easily download it to any of your mobile devices. Google Fit and Apple Health support Better flexibility for health data management Personalized sleep-quality analysis VivoWatch SP tracks your sleep duration and quality, giving you insights to help you get your best night’s sleep. By tracking your heart rate in the background, VivoWatch SP can determine when you are winding down and begin automatically tracking your sleep. It also uses your pulse oxygen and heart rate measurements to determine how deep and restful your sleep is. Movement throughout the night is another indicator of sleep quality, so VivoWatch SP tracks your motion and records how many times you turn from side to side each night. The sleep information VivoWatch SP tracks syncs automatically to the ASUS HealthConnect app, where you can review your daily sleep summary and see weekly statistics. Your 24/7 smart assistant Water resistant to 50 meters With excellent water resistance, you can wear VivoWatch SP while swimming or get caught in the occasional rainstorm without worry. Long battery life VivoWatch SP delivers up to 14 days of battery life in normal operation, making it a 24/7 companion that is always there to help guide you to better health. Call and text notifications Receive visual and vibration notifications of incoming calls and texts without taking your phone out of your pocket or bag. World clock Display a second time zone and the time difference between local time for convenience while traveling. Stylish and convenient With a universal design that accepts standard quick-release watch bands, you can easily change the look of VivoWatch SP to match your personal style and fit any occasion. VivoWatch SP also features a variety of attractive watch faces to choose from, giving you more options to create a watch that's truly your own.
Get better results from your workout routine.

Check workout readiness with your Daily Readiness Score.
Daily Readiness Score analyses your recent activity, sleep, and heart rate variability to determine your exercise readiness. Depending on factors like activity levels, heart rate variability, and sleep patterns, it might recommend a meditation class rather than an intense workout.

Track more workouts than ever and get all the credit.
Choose from strength training, kayaking and more with 40+ exercise modes and see your stats in the moment on your smartwatch. Plus, get real-time pace and distance during outdoor workouts—no phone necessary—with built-in GPS.

Navigate, pay and stay in touch all day.
Reach your destinations easier with turn-by-turn directions from Google Maps.4 Make speedy, secure checkouts from your wrist with Google Wallet.5

Stay comfortable with a thin, lightweight design.
Stay comfortable all day, during workouts, sleep and more with a design that fits more naturally on the wrist.
Understand stress with all-day body response tracking.
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.

Sleep Profile and Sleep Score give insights for better sleep.
Sleep Profile9 breaks down your sleep data each month and pinpoints how you can improve sleep based on 10 key sleep metrics.

Check your Sleep Score to learn about the quality of your previous night's sleep, and get a breakdown of time in light, deep, and REM sleep with Fitbit Premium.2

Focus on your heart with the ECG app and heart rate tracking.
Use the ECG app for on-demand atrial fibrillation assessment or turn on irregular heart rhythm notifications to assess your heart rhythm while you're still or sleeping.3

Heart rate tracking surfaces insights from your sleep, stress, activity, and more while high and low heart rate notifications keep a close eye on your heart.

Get more out of your workouts.
Your Daily Readiness Score analyzes recent activity, sleep, and heart rate variability. Maybe you’re signed up for a HIIT class but change plans after seeing your score – Fitbit Premium serves up a yoga flow for you.2

Help from Google Maps and Google Wallet.
Reach your destinations easier with turn-by-turn directions from Google Maps.5 Make speedy, secure checkouts from your wrist with Google Wallet.4
Understand stress with all-day body response tracking.
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.

Sleep Profile and Sleep Score give insights for better sleep.
Sleep Profile9 breaks down your sleep data each month and pinpoints how you can improve sleep based on 10 key sleep metrics.

Check your Sleep Score to learn about the quality of your previous night's sleep, and get a breakdown of time in light, deep, and REM sleep with Fitbit Premium.2

Focus on your heart with the ECG app and heart rate tracking.
Use the ECG app for on-demand atrial fibrillation assessment or turn on irregular heart rhythm notifications to assess your heart rhythm while you're still or sleeping.3

Heart rate tracking surfaces insights from your sleep, stress, activity, and more while high and low heart rate notifications keep a close eye on your heart.

Get more out of your workouts.
Your Daily Readiness Score analyzes recent activity, sleep, and heart rate variability. Maybe you’re signed up for a HIIT class but change plans after seeing your score – Fitbit Premium serves up a yoga flow for you.2

Help from Google Maps and Google Wallet.
Reach your destinations easier with turn-by-turn directions from Google Maps.5 Make speedy, secure checkouts from your wrist with Google Wallet.4
Get better results from your workout routine.

Check workout readiness with your Daily Readiness Score.
Daily Readiness Score analyses your recent activity, sleep, and heart rate variability to determine your exercise readiness. Depending on factors like activity levels, heart rate variability, and sleep patterns, it might recommend a meditation class rather than an intense workout.

Track more workouts than ever and get all the credit.
Choose from strength training, kayaking and more with 40+ exercise modes and see your stats in the moment on your smartwatch. Plus, get real-time pace and distance during outdoor workouts—no phone necessary—with built-in GPS.

Navigate, pay and stay in touch all day.
Reach your destinations easier with turn-by-turn directions from Google Maps.4 Make speedy, secure checkouts from your wrist with Google Wallet.5

Stay comfortable with a thin, lightweight design.
Stay comfortable all day, during workouts, sleep and more with a design that fits more naturally on the wrist.
Short Description
Fitbit Sense 2 Shadow Grey/Graphite
LCD, Bluetooth, Health Sensor, gravity sensor, GPS, altimeter, 5 ATM, 36 g, 200 mA
Fitbit Versa 4 Waterfall Blue/Platinum
Fitbit Sense 2 Lunar White/Platinum
Fitbit Sense 2 Blue Mist/Soft Gold
Fitbit Versa 4 Pink Sand/Copper Rose
Manufacturer
Fitbit
ASUS
Fitbit
Fitbit
Fitbit
Fitbit