This is the base of the Raspberry Pi Model B / Pi 2 case. You can add lids from Adafruit's website. This yellow base enclosure was designed by Mike Doell. It's made of ultra-durable, super-glossy polycarbonate, and is both good looking and tough enough to toss into your bookbag or toolbox. It has slim openings for all your cables, an easy-to-remove beveled slot for your Micro SD card, slots for both your Pi Camera and upcoming Display, and a space for your GPIO cable to extend out from the Pi. The Pi snaps into the base and the lid fits snugly onto the top. If you want to break out your Pi you can use your case without the lid and add hats to your B with ease.