This 12-digit desktop calculator features large upright LCD display. Its 100 steps check and correct function, business calculation ensure accurate operation. - Large upright angle display - Business calculation - 100 steps check and correct calculation Display - Display Type Liquid Crystal Display - Digit Display 12-Digit - Display Screen Size 91 x 23.5mm (Large Display) Functionality - Constant Calculation Yes - Business Calculation Yes (Cost, Sell, Margin) - Tax Calculation N/A - Check and Correct 100 steps check and correct function - Auto Check N/A - Memory Yes (RM, CM, M+, M-) - Grand Total N/A - Reverse Key (RV) N/A - Sign Change Yes - Shift Key / Backspace Key Yes - Decimal Yes (+, 4, 3, 2, 1, 0, F) - Rounding Yes (Up, 5 / 4, Dn) - Automatic Power Off Yes (7mins.) General - Power Source Dual Power (Battery + Solar) - Dimensions (L x W x H) 174 x 123 x 38mm - Weight 170g - Other Features 1. Upright Angled Display