1. TPU material, non-toxic and odorless, has excellent wear resistance, not easy ageing, bright color characteristics, more than ordinary plastic has good protective and functional. 2. All buttons and ports are accessible. 3. Simple, comfortable, easy to carry. 4. It adequately protects devices from the normal scratches, dirt, tear and wear. 5. The ring holder can be rotated 360 degrees horizontally or 90 degrees vertically.