Band material: Silicone Feature:1.Watch easily removable from hand strap to change battery(1pc "377" battery) and set time.You can remove the watchcase or the watchband for a new combination; 2.Smart "pop" bands that is easy wear and remove,make funs any time; 3.Suitable for any occasions like party, ball and date use,and great gift for student back to school,sport,running,travel,holiday and birthday Size:Band:28x3cm,Watchcase:dia.3.2cm x 8mm thick,watchface:dia.2.6cm