Features: Custom game cartridge label OS-V23 , The newest and best circuit Don't support OS updates. With save function, save progre, never lost Come with a 8 GB card as a gift, come with many games Support user add or delete games Any question, just contact us. KY Technology-N8 HARDWARE: Powerful Cyclone II FPGA. 2 x 512Kbyte SRAM for PRG and CHR data. 128Kbyte battery backed memory. It write save data to SD. Max II CPLD to handle FPGA reconfiguration, BIOS and SD interfaces. 1Mbyte flash BIOS. Voltage shift buffers on PPU and CPU bus for matching levels between 5V bus and 3.3V bus. Far better than simple resistor buffers at reducing noise and power consumption. Note:1. Please use original console to play it.(Some of clone consoles couldn't run it, somegood quality clone console can run it. So we recommend the original game console)2. Make sure your game console slot is clean. Or you will get a black screen.