Assuming it is a media player, how about listing some features?
Support for Audio: OGG, FLAC, ASF, WAV, WMA, etc?
Support for Image: jpeg, tiff, bmp, etc?
Support for video: xvid avi?
Bit rates handled (8 - 500 Kbps)?
Equalizer & Enhance Options? SRS WOW, WOW HD, Trubass, etc? Parametric EQ?
Screen size & resolution?
Rated frequency response: 20 - 20Khz?
USB OTG support?
Drive Capacity Type and size?
Line in/Line out Options?
Battery type and playback hrs?
Jason, if you want to sell heaps of units, make the firmware open to the Rockbox team and they will improve things for you!