It originates from China and is in no way associated with Sega, but it will run Dreamcast games from all regions (due to it's firmware) and also has it's own bespoke range of software...and as far as I can tell, DreamPhoto is intended for use with such a package called Photo Hunter. More (or not, as the case may be) on that in a moment, but first - here are some pictures of the DreamPhoto unit:
If you do a Google search for Photo Hunter, very little information comes up, but from what little there is on the various forums I have deduced that it is/was a photo organising suite (or similar) that's only compatible with the Treamcast. The front of the DreamPhoto box also alludes to 'PDA, Network system and a whole Lot more'[sic] so I'm a little confused to what Photo Hunter actually allows Treamcast owners to do with their systems. Alas, I don't own the disc and from what I can tell it isn't compatible with a regular Dreamcast anyway. If anyone knows differently, please let us know (and likewise if you know of anywhere it is available to download from - I'd still like to try it, even if it is believed to be incompatible).
In slightly unrelated news, I was featured in the latest (April 2015) issue of RetroGamer Magazine's Collector's Corner - thought you might like a little look, especially if the mag isn't available in your part of the world: