The New and Improved iBill Money Identifier
Orbit Research first released the iBill Talking Banknote Identifier back in 2009. It retains the title of smallest bill identifier on the market. It also is the least expensive and possibly the most accurate.
The new iBill, released in the Fall of 2012 is updated for the new versions of U.S. currency. It also has louder volume and a headphone jack for private listening. The vibration mode makes the iBill usable by the deaf blind as well.