FitBit One Wireless Activity & Sleep Tracker, Burgundy or Black

Monitor How Long & How Well You Sleep
Set Goals, View Progress, & Earn Badges
Free iPhone & Android App
Small & Discreet – Wear in Pocket, on Belt or Bra
Log Food, Weight & More on Fitbit’s Website or Apps
Sweat, Rain, & Splash Proof
Rechargeable Lithium-ion Polymer Battery