ABOUT LANCARDOLancardo is a young trendy fashion watch band start at 2015, we specialized in design, development and produce all kinds of watches and watch accessories.we have excellent designers , experienced factory, passionate sales & customer service team. Our goal is that everyone can enjoy our beautiful fashion watches, and your satisfaction is our NO.1 principle.HOW TO ADJUST BAND LENGTH AND REPLACE BATTERY We have special tool to adjust band size or replace battery, please search Lancardo watch tool on AmazonWHAT IS IN THE PACKAGE: Watch x 1 Box x 1WARRANTY 60 days money back or free replacement guaranteed if there is quality problem