Exact prices change frequently, which is why only approximate ranges are listed.
$ - Under $5
$$ - Between $6 and $50
$$$ - Between $51 and $250
$$$$ - Over $250
Matchinski, T. t., & Winters, J. j. (2016). A Comparison of Subjects' Reading and Writing Performance and Preference While Using Various Portable Electronic Magnifiers. Journal Of Visual Impairment & Blindness, 110(6), 454-460.