[. . . ] CITIZEN model SDC-664S is a dual-powered (high power solar + back-up battery) calculator operative under any lighting conditions. [. . . ] [MR] : Memory recall key [MC] : Memory clear key [SET]: Exchange rate setting key [LOCAL ]: Local currency key / To recall exchange rate when pressing [SET] and [LOCAL] keys [ ]: Universal currency key / To store exchange rate when pressing [SET] and [ ] keys Before performing each calculation, press the [ En If you want to dispose this product, do not mix with general household waste. There is a separate collection systems for used electronics products in accordance with legislation under the WEEE Directive (Directive 2002/96/EC) and is effective only within European Union. The symbol in this information sheet means that used batteries should not be mixed with general household waste. For proper treatment, recovery and recycling of used batteries, please take them to applicable collection points. [. . . ] If you wish to discard used batteries, please contact your local authorities or dealer and ask for the correct method of disposal. [. . . ]