Guess Galactic Ladies Watch Digital Alarm Chronograph W1031L2 Silicone case, black, mat Silicone strap, black, pin buckle Quartz movement, battery operated Weekday display, Date display Chronograph function, Stop watch Timer Alarm function Water Resistant Dial color black / grey Case width around 40 mm Case height around 13 mm Comes with box and information card. For environmental reasons, operating instructions and further information are only available on the manufacturers website!