Sorry the memory card for the SPS-500 series is no longer available
The SAM4s SPS-520RT Memory Card expands the memory in your cash register. The memory requires allocation once installed in the cash register. With proper allocation you can achieve up to 60K UPCs. This item is user installable. There are certain precautions one should always take working on electronics. Self installing parts can void your warranty on the register and/or part.