Excuse me, what is this? What is this for? I bought a mobile phone case as a gift.

Usually, there are two small holes in the lower right of the mobile phone case to hang the neck rope. After putting the black rope on a circle, take a thicker black rope. At this time, you can press the bump in the middle of the rope bottom and buckle the hand rope with a ring.

According to personal preference, you can hang it or not.