The World Travel Adapter Kit includes seven plugs with prongs that fit the different electrical outlet types found around the world. The plugs work with iPod, iPhone, iPad, and Mac laptops using Apple USB-C Power Adapters; MagSafe/MagSafe 2 Power Adapters; 10W and 12W USB Power Adapters; and Portable Power Adapters.
AC power outlets supported include: North America, Japan, China, United Kingdom, Continental Europe, Korea, Australia, Hong Kong, and Brazil.
This version of the World Travel Adapter Kit was released in 2015 and revised from the previous version by removing the iOS cable. According to MacRumors.com, “The new kit that Apple’s selling no longer includes a 30-pin to USB cable, and rather than adding a Lightning to USB cable, Apple has instead opted to ship the kit with no cable and drop the price by $10. ” The price for this kit was $29.
Source: Apple, MacRumors.com