Summary Dual power ways: Solar power or 1 AA battery (Battery Included) , energy saving and convenient. Adopt Japanese LCD screen, 12 digits, display data clearly. Support +/-(negative)，%，√ calculation; Rounding off & decimal place setting; CE/C (part/all clear), MC/MR/M+/M- (memory) key. Auto shut-down in 8min if no further operation. Big ABS plastic button, offer accurate positioning and comfortable texture, support >1 million times press. Calculators HIHUHEN Large Calculator Solar & Battery Power 12 Digit Display Multi-Functional Big Button for Business Office School Calculating (2 x Description Multi-functional scientific calculator, nice helper for data dealers, improve your efficiency and accuracy! Features: Dual power ways: Solar power or 1 button battery (Battery Included) , energy saving and convenient. Adopt Japanese LCD screen, 12 digits, display data clearly. Support +/-(negative)，%， calculation. Support Rounding off & decimal place setting. With CE/C (part/all clear), MC/MR/M+/M- (memory) key. Auto shut-down in 8min if no further operation. Big ABS plastic button, offer accurate positioning and comfortable texture, support >1 million times press. With non-slip silicon on the bottom for stability. Multi-functional scientific calculator, nice helper for data dealers, improve your efficiency and accuracy! Specifications: Item Size: 19 * 14 * 4cm Item Weight: 200g Package List: 1 * Calculator 1* AA Battery