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Not to be confused with the PSP SOCOM Headset, the Summit Sony PSP Wireless Headset uses an FM transmitter to broadcast the audio from your PSP to the included earphones, effectively giving you wireless audio from your PSP. (A version of these headphones were released for the Game Boy SP, and the GBA pair I tested worked quite well.) In theory this should also allow you to broadcast audio from your PSP to your car radio or home stereo via FM - has anyone actually tried this?

Summit Sony PSP Wireless Headset :: Amazon.com