This is a top that replaces the top for another Raspberry Pi case, thing:101837. I included the bottom here for completeness but I did not make any changes to it. The top has a hole for the 2.8 TFT display and space for the 4 optional buttons. There is a lip on the bottom fits around the board and it snaps in. So the GPIO connect actually becomes the connection between the top and the bottom of the case. Combined with a mini wireless keyboard, a wifi dongle and power supply it makes a nice little self contained RaspberryPi computer that can travel well in a backpack, etc.