Fitbit FB523BKBK-US Versa 4 Fitness Activity Tracker Watch Black/Graphite Aluminium Heart rate tracking The heart of it all—heart rate powers important data like calorie burn, sleep stages, resting heart rate & more. Active Zone Minutes Tracks your time in heart rate zones so you get credit when you work harder. Workouts in cardio or peak zones earn double minutes. Built-in GPS See pace & distance on your wrist—no phone needed Cardio Fitness Score Estimate your fitness level using your VO2 Max (how well your body uses oxygen during exercise). Daily Readiness Score Find out if your body's ready to work out or needs time to recover. Available with Premium. Automatic exercise tracking Auto-detects when you're exercising and records your stats in the app. Exercise modes Track your favorite exercises like runs, bike rides, weights, yoga & more and get live stats on your wrist. Water resistant Water resistant to 50m for the pool, shower & more. Workouts on your phone Sweat to high-energy workouts in the Fitbit app, from Fitbit trainers & popular partner brands. Most workouts require a Premium membership. Steps, distance & calories Displays stats on wrist and in the Fitbit app. SpO2 (blood oxygen) tracking Tracking SpO2 tells you how well blood oxygen is distributed in your body, which can help you understand potential changes in your wellness. Resting heart rate An important indicator of your heart health & fitness. In general, active people have a lower RHR. High & low heart rate notifications If resting heart rate is above or below your usual range, you get notified in the Fitbit app. Heart rate variability Tracks HRV–your time between heartbeats. A downward trend over multiple nights could potentially be a result of overtraining, lack of sleep, stress and more. Skin temperature variation Identifies changes in skin temperature, which can be related to activity, illness, menstrual cycle & more. Breathing rate Small variations in your breathing rate could be a sign of changes in your well-being. Wellness report Get a PDF of your key health & wellness stats from the last few months that you can share with a healthcare professional. Available with Premium. Blood glucose tracking (in app only) Log your glucose levels and see how activity, sleep, stress & nutrition impact your trends in the Fitbit app. Advanced analytics available with Premium. Menstrual health tracking Log periods, record symptoms, find patterns in your cycle & estimate your ovulation window. Sleep tracking & sleep stages Automatically tracks how long you sleep each night and time spent in light, deep and REM sleep stages. Sleep Profile Get matched with a sleep animal and see a personalized analysis of your sleep every month. Requires Fitbit Premium membership. Not intended for medical purposes. Consult your healthcare professional for questions about your health. Sleep Score Learn about the quality of your previous night's sleep with a personalized Sleep Score. Smart Wake alarm Vibrating alarm wakes you during the optimal sleep stage so you feel refreshed. Stress Management Score See how well your body's handling stress each day. Detailed score breakdown available with Premium. Mindfulness sessions Access tracks for meditation, yoga, relaxation, sleep & more. Most sessions require a Premium membership Relax breathing sessions Do simple guided breathing sessions by following prompts on your wrist. Reflections Log your mood and get in tune with your emotional stress. On-wrist Bluetooth calls Answer calls on your wrist, send callers to voicemail and adjust volume (when your phone is nearby) Call, text and app notifications See calls, texts & smartphone app notifications on your wrist when your phone is nearby. Alexa Built-in Use Alexa Built-in to get quick news and weather, set alarms, control your smart home devices and more. Google Maps Easily get where you're going with an interactive view and turn-by-turn directions on your wrist. Google Wallet Make purchases from your wrist with Google Wallet everywhere Google Pay is accepted. Coming soon. Fitbit Pay Make purchases from your wrist with Fitbit Pay Find My Phone Find your phone without making someone call it for you. Always-on display mode Keeps your display on at all times (may require more frequent charging). Do not disturb & sleep mode Mutes calls & notifications and turns your screen off. Fast charging Get a day's worth of battery in just 12 minutes. Battery life varies with use & other factors. 6+ day battery Long battery life means less charging, more living. Battery life varies with use & other factors. Thin, lightweight design Stay comfortable all day, during workouts, sleep and more with a design that fits more naturally on the wrist. Color touchscreen A bright color display for sharp stats all day. Clock faces & accessories Give your Fitbit a stylish new look with dozens of clock faces and accessory bands to choose from. Compatible with iOS and Android devices Fitbit devices are compatible with iOS and Android phones.
