The system has been upgraded to the latest OS V4 version. Please do not use the official program to upgrade again, as it will lock the device and render it unusable. We have pre-loaded 2750 games, including almost all GB and GBC titles. You can also remove and add your own games by simply downloading game ROMs to the memory card. Upgraded to OSv4 for improved energy efficiency, eliminating the need to launch the memory card program each time. Button customization is available in OS v4. Features a power-saving module that conserves 30% more power. GBP can also run perfectly with standard AAA batteries. (Note: Many GBP LCD high-brightness modification schemes are power-intensive. Stable voltage AAA batteries must be used. We cannot guarantee support for GBP with high-brightness LCDs). Supports 99% of GB games. Clock functionality is not supported. Supports micro-SD cards up to 32GB. Supports FAT32 formatted micro-SD cards. Color: Transparent + Black Material: ABS Package Contents: 1 x Game Cartridge Card Note: Due to different batches, the product sticker may vary, but this does not affect functionality. Only the above package content is included; other products are not. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real object. The allowed measurement error is +/- 1-3 cm.