Heavy Duty Calculator Compact Tabletop 10 * 107 * 179mm Extra large display: The display can be easily read even more data to large. Two won power supply (solar + battery): If there is enough light, supply the solar power and has a battery power supply if there is insufficient light. Key Rollover: Since the key operation is stored in the buffer will not be lost even during high-speed input. Plastic key: It is designed and manufactured to be easily manipulated. Durable metal Dial: You can cover the rough withstand rugged environments. Taxes and currency exchange calculations: tax calculations and currency conversion functions. Tilt the display: You can freely adjust the angle of the display. Yield: using the% key, you can also enter additional, discounts, ratios and increase / decrease the value, as well as quick access to prices and profits. Operation instruction code: Mnemonic display indicates the status of the operations currently performed. Durable heavy-duty key: The key to making plastic injection of two colors. They do wear out or fade due to the use key display is made of plastic.dgboy