PSP iTrip Wireless Audio Uses any frequency form 87.7 to 107.9 High stability crystal oscillator, phase-lock loop control Powered from the PSP - needs no batteries Connects directly to PSP - no cables or dongles Uses any frequency form 87.7 to 107.9 High stability crystal oscillator, phase-lock loop control Powered from the PSP - needs no batteries Connects directly to PSP - no cables or dongles