Features: Dual power ways: Solar power or 1pcs AAA battery, energy saving and convenient. (Battery is not included.) 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!