4 digit digital art tablet Amazon Digital Signature is a digital art scale designed to be used in digital signatures. 

The design was created by the digital art company, Digital Art, and is used by several of the most popular digital signatures on the web. 

Each of the 4 digit art tablets can be used to create a digital signature and are currently available for $199 on Amazon. 

A few other popular signatures are The New York Times, The Wall Street Journal, Vanity Fair, and The Washington Post. 

If you want to know more about digital signatures, check out this post from the Office of Strategic Services.