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Key Features
- Stylish black with graphite details.
- Monitors heart rate, sleep, and fitness activities.
- Perfect for tracking outdoor workouts independently.
- Stay connected with call, text, and app notifications.
- Enjoy longer usage without frequent charging.

Fitbit Versa 4 Smart Watch, Blue/Aluminum FB523SRAG

Get better results from your workout routine with Versa 4 + Fitbit Premium. Designed for fitness, this lightweight and comfortable smartwatch has Daily Readiness Score, Active Zone Minutes, 40+ exercise modes and GPS.3 Stay connected with call, text and app notifications and get help on the go with Google Wallet and Maps conveniently on your wrist.4
- • 6+ Days Battery Life with Fast Charge
- • iOS and Android™ Compatible
- • Active Zone Minutes
- • Real-time Workout Stats
- • Daily Readiness Score Premium
- • Bluetooth® Calls & Text Notifications
- • Built-in Amazon Alexa Voice Assistant
- • Stress Management Score
- • High & Low Heart Rate Notifications
- • Guided Breathing & Meditations Relax App
KEY FEATURES:
Designed for fitness
Our super-thin smartwatch keeps you comfortable during workouts, sleep and more with a lightweight design that sits more naturally on the wrist.
Redefine your routine
Plan your workout each day based on what your body’s ready for. Daily Readiness Score uses your activity, sleep and heart rate variability to reveal if you’re up for a challenging workout or should take time to recover.3
More effective workouts
Active Zone Minutes keeps you accountable during workouts by showing how your efforts add up in real time—the more intense your activity, the more minutes you earn. And now with 40+ exercise modes and built-in GPS, this watch was built for tracking your activity no matter the workout.
BUILT-IN GPS
Use the built-in GPS to see your pace & distance during outdoor exercise, then check your heart rate zones in the Fitbit app afterward.
GUIDED WORKOUTS PREMIUM
Access motivating workouts from partners like Daily Burn, Aaptiv & more. See real-time stats in the app while you work out.5
24/7 HEART RATE TRACKING
With an advanced multipath sensor, Versa 4 tracks heart rate continuously during exercise, sleep and everything in between.
HEALTH METRICS DASHBOARD & BLOOD OXYGEN (SPO2)
The Health Metrics Dashboard track changes in your well-being, giving you a view of your trends and changes.6 It also features Blood Oxygen (SpO2) tracking that tracks the level of oxygen in your blood to help you learn when there may be an indication of important changes in your well-being.7
SLEEP STAGES & SLEEP SCORE
Learn how getting better rest can help energise your day by seeing your time in light, deep and REM sleep. Plus, better understand your sleep quality with your daily Sleep Score and Sleep Profile Premium.
SMART WAKE + SILENT ALARMS
Wake up feeling more rested, refreshed and ready to take on your daily workout with Smart Wake. This smart alarm goes off during the optimal stage of sleep.
BLUETOOTH® CALLS & TEXT NOTIFICATIONS
Answer calls on Versa 4 using the mic and speaker. Never miss a call, text or calendar event by glancing at notifications on your wrist.8
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.9
BATTERY + FAST CHARGING
With a 6+ day battery life, Versa 4 tracks your morning, night & everything in between without needing to stop for a charge—get 24 hours of charge in only 12 minutes.10
1 New Premium users only. Must activate with device. Valid payment method required. Free trial must be activated within 60 days of device activation. Cancel before free trial ends to avoid subscription fees.
2 Google Maps Android Only, iOS launching Q2 2023
3 Daily Readiness, Sleep Profile, Snore & Noise Detect & most mindfulness sessions require a Fitbit Premium membership.
4 Data rates may apply. Google apps are not available in all countries or languages.
5 Workouts may be available in English only.
6 Only available in select countries. Not intended for medical purposes or to diagnose or treat any medical condition. This feature is only intended to provide information to assist you with managing your well-being.
7 The SpO2 feature is not intended to diagnose or treat any medical condition or for any other medical purpose. It is intended to help you manage your well-being and keep track of your information.
8 Only when your phone is nearby.
9 Voice assistant features may vary, see https://www.fitbit.com/global/us/technology/voice.
10 Varies with use and other factors. Up to 12 hours with continuous GPS.
Specifications
Global
- Charger Type: Wireless Charger
- Model Number: FB523BKBK
General
- Colour: Black, Graphite
Features
- Alarm: Yes
- Altimeter: Yes
- Blood Oxigen Sensor: Yes
- Calendar: Yes
- Call Function: Yes
- Calorie Count: Yes
- Compass: No
- GPS: Yes
- Heart Rate Monitoring: Yes
- Step Count: Yes
- Water Resistant: Yes
Size
- Wrist Size (In): 5.5-7.1 small, 7.1-8.7 large
Design
- Strap Color: Graphite Black
Battery
- Battery Type: Rechargeable Lithium Ion Battery
- Charge Time (Hrs): 12 mins
- Estimated Battery Life (h): 144
Display
- Display Type: AMOLED
- Touch Screen: Yes
Connectivity
- Bluetooth: Yes
- NFC: Yes
- Wi-Fi: Yes
Sensors
- Accelerometer: Yes
- Barometer: No
- Gyro Sensor: Yes
- Heart Rate Sensor: Yes
Dimensions
- Depth: 40.48mm
- Height: 12.35mm
- Width: 40.48mm
Weight
- Weight (Kg): 0.038
In The Box & Warranty
- Included: 2 x Straps Small & Large, Magnetic Charger
- Warranty (Years): 1
Why Buy?
A Smarter Way to Stay on Top of Your Health Every Day
The Fitbit Versa 4 is worth wearing every day because it quietly does the hard work of keeping you informed about your health — without you having to think about it.
Whether you're heading out for a run, hitting the gym, or just trying to sleep better, the Versa 4 tracks what matters in the background. It keeps an eye on your heart rate around the clock, gives you real insight into your sleep quality, and logs your workouts automatically — including outdoor sessions on their own, no phone needed. You'll also stay across calls, messages, and app alerts straight from your wrist, so you're not constantly reaching for your phone during the day.
It looks sharp enough to wear from a morning walk through to the office, with a clean black and graphite finish that suits most styles and occasions. Battery life is generous too, meaning you won't be scrambling for a charger every other night — just wear it and get on with your day.
Buy This If…
- You want to understand your health better without extra effort
- You exercise outdoors and want to track it phone-free
- You're tired of poor sleep but not sure what's causing it
- You want fewer reasons to check your phone during the day
- You need a watch that works as hard as you do, all day long





