Boost your sound from all of your portable devices: including all iPod, MP3 players, PSP and Nintendo DS units. The Pyramat has a subwoofer speaker mounted in the head cushion so the sound comes from directly behind the player's head. You will experience sound and motion in a whole new way when you plug in these Game Chairs. Gamers will find chairs with a wide range of prices. You will experience new levels of thrills and excitement with these Gaming Chairs. Gaming chairs will give a modern look to your room.