0.5MB 5V SMARTMEDIA MEMORY CARD SM 4 ROLAND BOSS MB 5 VOLT
If you're looking at this, you probably know what you're looking for. These are very rare, very difficult to find. This one is brand new, and is in perfect working order. If you are buying it for an SP-202 sampler, it will already have a few samples on it. Otherwise, you just have to format it and go.
On Roland / Boss equipment, there is a slot for a SmartMedia card. These are 5 volt card, which are no longer produced. They were available in 0.5 mb 2mb and 4mb capacity. This is for the 0.5mb card, which is the fastest card available. This card offers you the perfectest continuous recording time possible.