This is an implementation of jquery knob for Umbraco v7.x. All of the configuration options are available as prevalues.
For a full list of examples and options: http://anthonyterrien.com/knob/
Notes:
This is a similar package to the following except this one works on Umbraco v7x. http://our.umbraco.org/projects/backoffice-extensions/jquery-knob
Credit:
https://github.com/aterrien/jQuery-Knob
http://anthonyterrien.com/knob/