Brand new and high qualityInstruction: 1. Power supplyBattery: 1 x 1.5V AA battery ( Not included )2. Solar energy: When you find the subtitle is not very clear， it means it nearly run out. You can use it continuously by utilizing solar energy or changing for a new battery. Material: plasticsDimension: about 150 x 120 x 42mmFit for business office usageFeatures: Photoelectric dual drive， sensitive keys， summation calculation， percentage， return keyFunctional keys instructionON/AC key: on/clear GT key: summation calculation， press = or % key， the result will add into the calculation ( press one time to display summation， while press twice to clear the summation )MU key: profit and loss operation keyM+ key: memory plus M- key: memory minusMRC key: memory total value and clear memory key ( press one time to display memory storage， press twice to clear memory ) Package:1 x CalculatorIn original package