... have functions include time( day/date ) , week , slap , Chronograph , Alarm clock , noctilucence and etc., 1. Made by 100% grade of silicone ... LJX002 for 15cm, 16cm, 17cm, 18cm, 19cm, 1=20cm(circumference)7. Color: Any colors are available to match well to PMS colors8 ...