Shure E4g Gaming Edition Sound Isolating Earphones for Portable Gaming Devices High Definition drivers with Tuned Port technology makes this the ultimate accessory for portable gaming Perfect accessory for your Sony PSP or iPod Nano Portable and lightweight design with a shorter, 57" cable Sound isolation prevents outside noise from interfering with your game or music, and creates a quiet space for exceptional audio clarity Shure makes audio equipment - microphones, earphones, mixers, etc. that are used by professional musicians the world over