With A Scrolling Lcd Display In Place Of Paper, The Sharp El-1901 Paperless Paperless printing calculator with a 12-digit display features a unique, powerful design that combines the power of a printing calculator with the functionality of a desktop calculator. Five-line, secondary LCD lets you scroll back and forth up to 300 lines to refer back to your previous calculations. Check and Correct function allows you to quickly modify and recalculate entries for fast, simple updates. Cost/sell/margin keys simplify profit margin calculations by allowing you to simply enter two variables to automatically show the third variable. Calculator also includes four-key memory, tax keys, change sign key, backspace key, rounding keys and more. Paperless printing calculator is eco-friendly with no paper and no ink. Entries and results are sent to a 5-line display which scrolls up or down to see the last 300 entries. Full-size keyboard includes tax, cost/sell/margin, grand total, backspace, and memory keys Quiet and Fast: No printer noise and no waiting for the printer Powered by AC Adapter