A simple accessory band to hook on your wristband and extend the overall size of your band from small to large or x-large. With our extender bands, you can easily "create" a larger wristband and you can put your wristand around your ankle and track more accurate steps when cycling or running on a treadmill. The package only include 2 pieces extender bands, it does not include any wristband, we kindly suggest you to use the extender bands on your original wristband and they will works perfect!