Multi-functional scientific calculator, nice helper for data dealers, improve your efficiency and accuracy!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),percent , 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 more than 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:Model: OS-2135 ProItem Size: 19 * 15.5 * 4cm / 7.5 * 6.1 * 1.6"Item Weight: 300g / 10.6ozPackage Size: 19.8 * 16.1 * 4cm / 7.8 * 6.3 * 1.6"Package Weight: 341g/12ozPackage List:1 * Calculator1 * User Manual(English/Chinese)Note:Battery is not included.