About-face! Get ready for RayD81. The glowing gate-keeper to the Underworld returns in a fourth generation black, white, and blue glow in the dark colorway! From the MIMOBOT Core Series 2.5. Preloaded digital Mimory. 2GB, 4GB, 8GB, 16GB capacities. Hi-speed USB 2.0. Mac/PC compatible. 2.5" tall by 1" wide. One-year limited warranty.