Dreamcast VMU Memory Card by Sega

The VMU is a memory card peripheral for the Sega Dreamcast. While its most basic function is being used as a removable storage device, the VMU may also serve as an auxiliary display during normal gameplay and acts as a handheld game console. Features of the VMU include a small black and white screen, speaker, directional pad, and four buttons. The VMU also has the ability to connect with another end-to-end to exchange data.