Never stop moving with Fitbit Flex. See how you’re stacking up against your daily goals 24 hours a day with steps, distance and calories burned all tracked. The Flex monitors your sleep and wakes you with a silent alarm. It’s easy to access your stats wirelessly to keep you motivated and more active. Please note refunds or exchanges can only be processed with a valid receipt if the item is in the original, unopened packaging (security seals must be intact).,Style: Product Shape:Bracelets, Fastening:Clasp, Rechargeable battery - battery life up to 5 days,2 Year manufacturing Guarantee,Adjustable wrist size from 140mm to 176mm,Strap width 14mm,Syncs automatically to your computer or select smartphones and tablets via Bluetooth 4.0 ,Log food, weight and more on Fitbit’s website or apps,Free Fitbit iPhone, Android and Windows app,LED lights show how your day is stacking up against your goal,Instantly launch your Fitbit app by tapping your device to your NFC enabled Android phone,Small & Large wristband included