Flip World Add-On
The Flip World Add-On retails for US$9.99 (S$14) and it consist of a US/AU Plug add-on and an EU Plug add-on.
It is compatible with Flip Duo, Flip Quad, and Flip Power
As mentioned in my Flip Duo World post, I bought the Flip World Add-On so that I can use it with my Flip Quad.
The default prongs on the plug will fit US, Canada, and Japan. But it can be rotated slightly to fit Australia and China.
For European countries, there is an additional adapter included in the packaging.