The Canon LS-122TS Desktop Calculator features a 12 digit large LCD display with functions such as tax calculations, cost-sell margin and constant calculation. The LS-122TS is solar and battery powered. It also includes a replaceable battery for added convenience. Ideal for business professionals 12 digit display Upright Angled Display Tax Calculation Cost-sell Margin Sign Change Metal Faceplate Solar and battery powered, includes a replaceable battery for added convenience