*Only Compatible with register part number SPB1-01* The Square SPB4-01 customer display CS078 is a credit card terminal designed by Square for their A-SKU-0666 Gen 1 Version 1 registers. This product provides a sleek and efficient way for businesses to process and display credit card transactions. With the Square brand reputation for quality and reliability, the SPB4-01 model ensures accurate and fast payments, making it a valuable tool for any retail or service business looking to improve their point of sale experience.