No need for the wifi and bt dongles anymore, are they are integrated in the Zero 2 W. You can connect keyboard and mouse either via bt or via a single usb otg dongle to connect a wireless keyboard/mouse set or a keyboard with integrated usb hub. In my opinion this is superior to the original B. And far superior to the original A anyway, while still being cheaper. Remember even the original B had just two USB ports, so in practice you needed an extra hub almost always, because of missing functionality that is now integrated.