The present invention relates to a biodegradable thermoplastic elastomer having the general formula A-B-A wherein each A is an amorphous polymer having a glass transition temperature >40\xb0 C. The body has a mounting surface that defines several openings to receive signal terminals. The omnidirectional photographing device includes: one camera module equipped with a lens capable of directly taking a 360-degree annular image; a main body for holding the camera module; and a display unit fixed to the main body, for displaying an image photographed by the camera module. The desired bit pattern can be converted into the specified bit pattern by given logical operation with the predetermined bit pattern. A decorative side is disposed opposite the mounting side and a universal engagement member, disposed on the mounting side, removably engages a trim ring on the recessed light and secure the universal trim piece to the housing and proximate to the ceiling.