Compatible with Fitbit Flex?? Fitbit Flex 2?? Fitbit Alta?? Alta HR fitness wristband and fit tightly</br>Extend your fitbit wristband from Small size to a Large or X-Large size</br>Wear your Fitbit wristband around ankle and get more accurate step counter</br>Fit adults ankle between 9" 12" sizes?? comfortable fit and no worry losing your fitbit</br>Package only include 1 x extender strap & 2 silicone fastener ring!</br></br>Product Description</br></br>If you purchased a wrong size band by careless or just feels the band fit too tight?? Baaletc extender band will be a good accessory for your consideration. It's very easy to extend your wristbands from small to large even X-large size. Because of size extension?? if you like?? you can aslo wear the fitbit around your ankle. When your riding a bike?? the fitbit may not record steps or record "teps" on your wrist?? however?? if you can wear it around your ankle?? then no problem with it. <br><br> The items compatible with:<br> Fitbit Flex<br> Fitbit Flex 2 HR<br> Fitbit Alta<br><br> (NOTICE: the package not include fitbit tracker or wristband)</br><br/>http://www.amazon.com/gp/product/B01N5EJ8M7rr comes