We engineered a fashionable alternative to securely hide and fit the Fitbit Flex or Flex 2 tracker perfectly! This concealed pouch means that the Fitbit will not dislodge from under the bracelet or pouch. So rather than wearing the plain plastic band that comes with your fitness tracker, you can simply use this elegant bracelet to dress up your look! Compatible with both Fitbit Flex and Flex 2. QUESTION: Will the tracker be as accurate when worn in a Funktional Wearables bracelet instead of the rubber wristband it is sold in? ANSWER: YES! The Fitbit engineering team has developed tracking algorithms to ensure accuracy whether the tracker is on your wrist, your core, or around your neck. For best performance, make sure that your "dominant hand" setting is on "non-dominant." Check out our other necklaces and bracelets designed to be worn with your Fitbit! This product is not an official product of Fitbit Inc. Fitbit not included. Not recommended to wear during work-outs or sleep.