Sharp EL-334MB Semi Desktop 10 Digit CalculatorFeatures: Extra Large Display 10-digit LCD display with punctuation Twin Power Solar Operation automatically switches from solar to battery power in low light. 4-Key Memory includes memory plus, memory minus, recall memory, and clear memory keys. Additional Features includes + tax and - tax keys, grand total, percent, sign change keys and kick stand display. Specifications: Display 10 digit,Viewing Angle Kick-stand, Grand Total Key,Power Supply Twin Power (solar cell & LR44 x 1),+Tax/-Tax Keys