✔ The 3 main slide switches that are on the back of the card are stronger now;
✔ The components placement are fully located inside of plastic cover to protect against ESD (electrostatic discharge)
✔ A card enclosure was designed to protect the card when you need to carry around
✔ A plastic case now fits perfectly to cover components and switches; 
✔ Label and serial number control
This memory card is a replacement for Roland’s M-128, M-256 and M-512 cards, as well as the electrically compatible Akai BR-16 and BR-32 cards. Compared to the original cards, this card has two advantages:
 
✔ It does not require a backup battery. It uses magnetoresistive RAM for storage rather than
regular static RAM, which is a type of RAM that can typically keep its data for twenty years
before it needs to be refreshed.
✔ A single card actually stores 16 M-128 / M-256 cards or 8 M-512 cards, which can be
accessed by a pair of convenient switch sliders at the rear end of the card.
✔ Like the original card, it also comes with a write protect switch.
 
YOU will receive 1 card configured to be 16 x 256K MRAM + 1 exclusive case ready to be used as you see on the picture + Manual.
Board size is 3.78L in x 2.13W x 0.078 in - Plastic cover is 4.13L x 2.49W x 0.665H
Card is pre configured with Roland D-50 All original cards already pre loaded from 00-04, then you have all rest of the banks ready to be used, but you can also reuse the banks where we saved the original cards.
The Original cards are saved on banks: 
A1 -> Card 00
A2 -> Card 01
A3 -> Card 02
A4 -> Card 03
B1 -> Card 04
B2 -> Best Choice!