The EL-1501 Compact Paperless Printing Calculator is a unique and powerful calculator, perfect for those that need the power of a printing calculator with the functionality of a desktop calculator. The EL-1501 features a 12-digit display with a 5-line scrolling LCD display. This larger scrolling display allows a user to go back and view up to 300 previous entries. The Compact Paperless Printing Calculator is whisper quiet, making it usable in any office environment. Other features include cost/sell/margin, 4-key memory, tax keys, change sign key, grand total key, backspace key, and selectable decimal and rounding keys. This unique compact paperless printing calculator is cordless and powered by 4 AA batteries.