An optical module of the present invention includes a first substrate 1, a second substrate 2, a PD 3, a LD 4, and an optical fiber 5. The waterproof fabric layers are partially superposed to form two connecting portions. The patterned conductive colloid replaces the conventional bond wires to improve the product yield and to omit the molding process. Also, time is displayed, plural time intervals are displayed, a desired one of the plural time intervals is selected and time display is controlled responsive to the selected time intervals, to facilitate retrieval of the information corresponding to the specified time. Such prepared aromatic organosulfur functionalized 1,4-cis polybutadiene is without ultrahigh molecular weight region and, thus, has narrow molecular weight distribution.