All day activity tracking with continuous heart rate
Track calorie burn, heart rate, gauge workout intensity and get a picture of your overall health without an uncomfortable chest strap.
Sleep tracking with sleep stages
Automatically tracks how long you sleep, shows your time spent in light, deep and REM sleep, and has a silent alarm to help you wake more peacefully.
Clear, bright OLED tap display
Gives you instant access to stats, the time and smartphone notifications.
Auto exercise recognition
SmartTrack™ technology automatically detects and logs workouts to the Fitbit dashboard, so you get credit without ever pushing a button.
Keeps you connected with call, text and calendar notifications on display, so you never miss the messages that matter.
Reminders to move
Tracker sends you friendly reminders to move that encourage you to stay active and help you fit more movement into your day.
Fits comfortably on most wrists from 6.7″ to 8.1″ in circumference.
Syncs to select Apple®, Android and Windows devices
Such as iPhone®, iPad®, iPod® touch and cell phones and tablets with Windows Phone or Android for simple wireless communication.
Monitor your goals and interact with friends
You can set goals, track your progress, connect with friends and share your milestones, get personalized fitness coaching and more with special Fitbit app.
*Distance/speed/pace can only be shared on 3G or 4G devices.
Apple, the Apple logo and iTunes are trademarks of Apple Computer, Inc., registered in the U.S. and other countries. iPod is a trademark of Apple Computer, Inc.
iPad is a trademark of Apple Inc., registered in the U.S. and other countries
Body Metrics Measured Activity vs. inactivity, Calories burned, Heart rate, Hours slept, Sleep quality, Stairs climbed, Steps taken
GPS Enabled No
App Compatible Yes
Mobile Operating System Compatibility Universal
Display Type OLED
Maximum Wrist Size 8.1 inches
Minimum Wrist Size 6.7 inches
Parts 1 year
Labor 1 Year
Silent Alarm Yes
Wearing Style Watch style, Wrist
Mobile Notifications Yes
Sensors Gesture sensor, Heart rate sensor, Odometer
Band Color Black
Band Material Other
Alert Type Audible, Vibration, Visual
Band Type Large
Buckle Color/Finish silver
Clasp Type Hidden
Instant On Yes
Battery Type Lithium-polymer
Replaceable Battery No
Color Category Black
Model Number FB408SBKL
Additional Accessories Included Charging cable
Clock Display Yes
Height 1.6 inches
Width 0.6 inches
Weight 0.05 pounds
Product Name Alta HR Activity Tracker + Heart Rate (Large)