Product Type: Wallet, Number of Rows Displayed: 1, Digit Display: 10 Digits, Basic Functions: Tax Calculation / Business Calculation / Percent/ Sign change / Constant calculation etc., Battery Included: Yes, Power Type: Battery and Solar, Battery Type: LR-1130 x 1, Colour: Grey / Black case. 10-digit large display with punctuation Tax calculation - will add or subtract a predetermined tax rate ideal for GST Business function - easily calculates Cost - Sell - Margin Memory and percentage functions Dual Powered.