Main Features:

No buckle needed, but firmly fit on your wrist
Gently pat it in extend status, the strap will roll up
Simply adjust to fit with different sizes
Easily to put on and take off
Silicone wrapped band provide comfortable feeling
The watch can take out from the rubber shell
Battery loaded
Water resistant (not for diving/swimming)
It's worth to buy for cheap and having a good quality

Specification: