The size of the strap is large and fits wrist sizes between 6 to 8 inch and it comes with call email what’s app music GPS hear rate monitor storage 4gb and ram 512 mb 3.86cm display Bluetooth support water resistant it can be used during practice of sports it gives heart beat rate it has long life battery and it comes with low cost suitable for mid class family’s and it come s with what’s app and Bluetooth and music and call supported and it is very useful and it is extremely excellent wrist watch.