UP 24 by Jawbone Activity Tracker - Small - Onyx (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished it shows limited or no wear Includes all original accessories plus a 90-day warranty Provides the motivation you need on your wrist to move more, sleep better, and improve your fitness Tracks steps, exercise, overall calories burned, hours slept and quality of sleep Track your food, drink, calories, nutrients and use the UP App Food Score to quickly know if you are eating right, Smart Coach communicates with you via vibrations at the wrist from a Smart Alarm(TM) to wake you up with an Idle Alert to get you moving, Connect with your friends and family so you can reach your goals together or see how you measure up on the team leaderboards