Dual Power With solar and battery operated systems, it can be fully powered, so you don't have to worry about running out of power. The working time is very long and it will automatically shut down if it is not used for 8 minutes. It is very intelligent. Stable on the desktop On the back of the calculator there are 4 non-slip pads that do not slip during use and ensure your buttons are accurate. Kiss the table top completely, very safe. Ergonomic-Design The ergonomically designed touch buttons make the calculation process faster and smoother; when the buttons are pressed, the corresponding numbers are quickly displayed on the screen. Made of high-strength ABS engineering plastic material, it feels comfortable in your hand when you use it.
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