The has been upgraded to the latest OS V4 version. do not use the to upgrade again. The will be locked and cannot be used. We downloaded 2750 games. all GB and games are included. You can also delete and add your own games. Just download ROM to the memory card. Upgrade to osv4. More energy saving, no need to start the memory card time. The AB key can be customized in OS v4. With the power saving module, 30% power can be saved. GBP can also run perfectly with ordinary AAA battery.(There are many refitting schemes for high brightness GBP LCD. Some solutions are very power intensive. AAA batteries with sufficient voltage stability must be used.We ' that support GBP with high brightness LCD) It supports 99% GB games. clock is not supported. Support mirco-SD card up to 32G. Support FAT32 -SD card. Colour:transparent + black Material: ABS Package Contents: 1 x Game card Note: Different batches, the sticker on the product may be different, it does not affect Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.