The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From fms LLC:
If you touch center of this watch and shake iphone, Self-winding weight will rotate. Get you automatic winding image, Operating of Mechanical image watch, Second hand to sweep lightly at 10Hz, Display of power to wound the screw, GMT ( world clock & select favorite 110 place ), Minutes repeater ( push to bell sound ), Calendar ( day ), Changing Day & Night mode display, Manual and automatic winding ( finger drive ), you can fun to operation.