Fitbit Alta HR Heart Rate and Fitness Wristband, Black - Small, B

Product Description
Move to the beat of you with a slim heart rate wristband that tracks activity, sleep and exercise, displays notifications and sends Reminders to Move.

PurePulse Heart Rate
Get continuous, wrist-based heart rate tracking and simplified heart rate zones.

All-Day Activity
Track steps, distance, calories burned, active minutes, hourly activity and stationary time.

Reminders to Move
Get friendly Reminders to Move that encourage you to reach an hourly goal of 250 steps.

Cardio Fitness Level
Get a better understanding of your fitness level and see how you can improve over time with a personalized Cardio Fitness Score.

Smartphone Notifications
See call, text and calendar alerts on display when your phone is nearby.

Auto Sleep Tracking and Silent Alarms
Automatically track your sleep quality and wake up peacefully with a silent alarm.

Sleep Stages
See your time in light, deep and REM stages to better understand your sleep quality.

SmartTrack
Automatically recognizes select activities and records them in the exercise section of the Fitbit app.

Interchangeable Accessories
Switch up your look with accessory bands in metal, leather and more.

Tap Display
Tap to see your stats, time and notifications on an OLED display, plus customize your clock face.

Syncs Wirelessly
Sync stats wirelessly and automatically to computers and 200+ leading iOS, Android and Windows devices.

Features:
Display
OLED tap display
Data
Bluetooth v4.0
General
Optical Heart Rate Tracker
3-axis accelerometer
Vibration motor
Syncs with Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, Android 4.4 and later, and Windows 10 devices.