-The AT-10 offers several easy-to-use functions. Includes tax +/-, cost/sell/margin, currency conversion, loan and saving calculations, square root, sign change and a "00" key.-One independent memory for easy retrieval. -Easy-to-read 2-line display with 8 characters per line. -Alphanumeric display allows you to combine text with numbers. -Automatically shuts off when not in use to save battery power. -Runs on 1 button cell battery (included) and solar power. -Carrying case protects your calculator in transit. -6.25"H x 3.17"W x 0.4"D.