used, clean main calculator with cover only- Used item, it is sold as pictured, please STUDY MY ACTUAL PICTURES of this item NOT THAT GENERIC STOCK ONE to see what?s included with this sale and its overall condition. Do your research before buying to be sure it's what you need, there is a restocking fee for my items. I WILL WARRANTY THIS ITEM, PLEASE LEAVE MY CUSTOM-MADE WHITE SECURITY TAMPER STICKERS OR SERIAL NUMBERS INTACT ON IT. If you have any questions, please contact me BEFORE buying. Pay attention to the posted estimated delivery time, all my items are shipped SIGNATURE REQUIRED UPON DELIVERY for security. Please buy accordingly, Thanks #2 Additional Details ------------------------------ Product description: Calculator provides advanced graphing for calculus, ap courses and university studies. Permitted for use on many state and standardized tests. Includes official ap calculus review questions on the enclosed product cd. Graphs functions, parametric and polar equations, recursively-defined sequences, three-dimensional surfaces, and differential equations. Includes ee*pro app for electrical engineering. Icon desktop allows easier access to apps and editors. Includes usb unit-to-unit link cable and ti connectivity cable. Offers 188k bytes of user-available ram, 2.7mb of user-available flash rom for data archive and apps, 100 x 160 pixel display, internal clock with date and time display, 99 graphing equations, 20 stored constants with symbolic units for scientific calculations, and 100 symbolic units in 28 categories for use in equations, computations, and unit conversions. Powered by four aaa batteries with a silver oxide battery backup to protect ram memory during main battery change. Specification met: