Innovating the workout experience. PurePulse Heart Rate Fitbit's PurePulse heart rate monitoring provides continuous automatic heart rate tracking without need for a chest strap. This helps improve the accuracy of the Blaze's calorie monitoring and enables you to keep track of your cardiovascular activity. Three heart rate zones – Fat Burn, Cardio, and Peak – let you hit the targets you need for your workout. Workout and all-day heart rate readings can be analyzed in the Fitbit app. Connected GPS Connect Fitbit Blaze with the GPS on your phone to map your routes and see run stats like pace and duration on display. On-Screen Workouts with FitStar Start a FitStar workout on your tracker and get step-by-step instructions and coaching right on your wrist. Enhanced features that keep fitness in focus. Multi-Sport Choose from sport modes like running, biking and cardio, to see real-time stats on display. SmartTrack Fitbit Blaze uses SmartTrack to automatically recognize and record exercises for you, so you’ll get credit for a workout even if you forget to log it. Workout Goals + Summaries Get an on-screen summary of each workout after you complete it, then check the Fitbit app to see how you’re progressing toward your weekly exercise goals. Stats and style for every occasion. All-Day Activity Measure all-day steps, distance, calories burned and active minutes. Multi-Faceted Clock Faces Fitbit Blaze has a hi-res color touchscreen with a variety of faces to choose from. Long Battery Life Wear Fitbit Blaze up to 5 full days and nights without needing a charge.* Accessory Bands + Fitness Easily alternate your bands and frames to change your style throughout the day. More ways to run your day. Call, Text & Calendar Alerts See smart notifications on screen, and swipe them away to move on with your day. Music Control Adjust your volume and play, pause or switch songs from your smartphone with a simple tap. Tools to help you get your best rest. Auto Sleep Tracking Fitbit Blaze automatically tracks your time asleep & time restless, to help you tailor your habits for a better night’s sleep. Silent Alarms To start your day in a less alarming way, set an alarm in the Fitbit app to get a silent vibration on your wrist in the morning.