Product description    Localized numbers: It displays the number of four-digit separator format (Type A， Type B， Type C， and Indian) Extra large display: It can be more easily read by more large display Two won power supply (solar + battery): If the light is sufficient if powered with solar light and insufficient supply power to the battery Key Rollover: Key operations are stored in the buffer it will not be lost even during high-speed input Plastic keys: It designed and built to be easily manipulated Durable metal munjaban: The cover can withstand rough use in rugged environments Tax calculation: Tax costs， discounts， sales， tax， discount， it will automatically calculate the profit amount Fixed Percentage: Fixed percentage calculations Margin: All calculations in the margins of the converter can be simplified cost and profit calculations Effective command code: Large and easy to read command code can determine the current operation at a glance