And Ron as I understand (and perhaps incorrectly) such items sent via free matter do not get the same priority as other pieces of mail.

On Sep 11, 2012, at 11:39 AM, Ronald E. Milliman <[log in to unmask]> wrote:

> A keyer is absolutely not eligible to be mailed as "Free Matter for the
> Blind."  It is not made specifically for a blind person and does not fit
> within either the letter or spirit of the postal regulations. Knowingly
> misusing the "Free Matter for the Blind," privilege is both unethical and
> illegal.  
> 
> As the President of the South Central Kentucky Council of the Blind, I have
> studied the postal regulations quite closely and even conferred with the
> postal authorities to be sure I understood the regulations before we used
> the "Free Matter for the Blind" stamped on our mailings and shipments going
> to our members, mailing materials to doctors' offices, etc.  Believe it or
> not, the postal inspectors will and do inspect some mailings and shipments
> to be sure they are not in violation of the postal regulations.  No, they
> do not inspect everything that is sent as "Free Matter for the Blind," but
> they will check anything that looks even a little suspicious.  
> 
> To use the "Free Matter for the Blind" mailing privilege, your item must be
> specifically for a legally blind person or persons and includes Braille and
> large print matter and devices designed for the specific use of blind
> people.  A Victor Reader Stream can be sent as "Free Matter for the Blind,"
> but an Olympus DS-50, which has speech built into it, cannot be sent as
> "Free Matter for the Blind" because the Olympus DS-50 was not designed
> specifically for the blind; though, it can certainly be used by the blind.
> In like manner, all of the Apple products, e.g. iPhone Apple TV, etc.
> cannot be shipped as "Free Matter for the Blind," even though they all have
> Voiceover built into them and can be used by a blind person.  
> 
> Ron M.
> 
> 
> Dr. Ronald E. Milliman, retired Professor Western Kentucky University
> 
> Chair, American Council of the Blind Public Relations Committee
> Monthly Monetary Support Program (MMS) Committee