Take your music & videos where ever you go with the Philips SA4VBE04SN-12 Vibe MP4 Player. Load up the 4GB HDD with your MP3, WAV, WMA, FLAC or APE files & away you go. Thanks to the FullSound, the Philips SA4VBE04SN-12 Vibe 4GB MP4 Player uses audio post-processing algorithm & Digital Signal Processor (DSP) to restore lost details to your MP3 music. With SafeSound your Philips SA4VBE04SN-12 Vibe 4GB MP4 Player can consistently check the sound level & alerts you if the volume could impact your long-term hearing. You can also allow SafeSound to automatically regulate the volume for you so you dont need to manually adjust any settings. The exceptional battery life of the Philips SA4VBE04SN-12 Vibe 4GB MP4 Player provides you up To 20 hours of music or 4 hours video playback.