It is a colorful biblical icon with golden glare on a cardboard base, in brand new mint condition. The picture doesn't reflect all of the beauty and gold glimmer. Modern metallography and lithography technologies were used to reproduce medieval and contemporary icons, making the details excellent of this particular icon. Artificial gold and silver foil was used during the printing process. You have to see the original. 

A guardian angel is an angel assigned to protect and guide a particular person. The belief in guardian angels can be traced throughout all antiquity. The concept of tutelary angels and their hierarchy was extensively developed in Christianity  in the 5th century by Pseudo-Dionysius the Areopagite.

The theology of angels, and tutelary spirits, has undergone many refinements since the 400s, and belief in both the East and the West is that guardian angels protect whichever person to whom God assigns them, and present prayers to God on that person's behalf.