Solar MP4 is a portable media player device that does it all WITHOUT the needs of a battery. Yes, as its name suggests, the device uses solar energy to power up all its capabilites. Once the solar panel collects enough energy, you can expect Solar MP4 to play your favourite song (MP3, WMA) or video (AVI, MPEG, WMV), display your romantic photo, and record your own sound (WAV). You can also listen to your favourite FM radio station if you want. In short, the device provides you with everything related to entertainment.