Operation confirmed. This is a third-party product, but its performance is equivalent to the official memory card. It has four times the storage capacity of a standard Visual Memory. You can switch between memory cards 1-4 using the switch on the side. Considering its age, I think it's in good condition. Please check the photos for details. Please note that it may be sold out as it is also being sold on other sites. DC Dreamcast 4MB Memory [GAME MAK DC] (Gold) Memory Card - Brand: DCX - Capacity: 4MB - Type: Memory Card - Compatibility: For Dreamcast