In an echo of that memory, the Millennium Centre's slate is inscribed by the sculptor Ieuan Rees with a couplet from the 15th Century poet Guto'r Glyn, a couplet which makes mention of slate as a building product to be treasured.
The heart of the product is the BoardX Motherboard, essentially a blank slate with a mini solderless breadboard and a host of ports for plugging in add-ons.
The above diagram suggests said slate has a microSD slot accessible from the outside, and if you take a closer look at the product label, you'll see that the device requires a whooping 2.5A input at 5V, which means it'll come with a 12.5W adapter -- a lot higher than many tablets' maximum consumption at 10W (including the new iPad) or below.