You can find a ton of info online if you just google refreshable Braille displays, iphones and accessibility, screenreaders for the blind. Etc.
You might also want to check out, www.humanware.com,
www.freedomscientific.com, www.bookshare.org, www.blio.com,
www.nfb.org and look under products. www.aph.org
www.teachblindstudents.org Complied by Ali Heitner