DISPLAY: 3.5-inch HD screen with 640 x 480 pixel resolution ATJ2273S 32-bit RISC 380M DDR1/DDR2 CPU/RAM SYSTEM:RTOS TF CARD: Allows for TF card expansion up to 64GB in size. ROCKER: Stereo Dual 3D Rocker CHARGE: 2A charging SFC, GBC, GBA, GB, FC, NES, MD, MAME, SMC, CPS, and SMD are examples of simulators. A special two-button design on the back supports a large screen and allows two people to connect.