Responsive Rubberized Buttons - The front part of the mp3 holder small case is raised about 1.4mm above the screen, while the rest of the case is about 2.8mm thicker than the player. Featuring responsive rubberized button protection with easy access. Sony Walkman MP3 Compatible - This is a Sony mp3 player accessories case fitted for Sony Walkman. The walkman case is compatible with the following Sony models: NW-A55HN, NW-A56HN, NW-A57HN, NW-A50, NW-A56, and NW-A57. Includes cutout for lanyard access. Rugged Hard Case - Rugged. Reliable. Drop-proof protection. Our Sony mp3 player case offers impact and shock resistance to protect against accidental drops, scratches, and bumps during transport. Open front keeps your device on display with easy touchscreen access.