It is a badly made TI-84 Plus Silver Edition. The bottom edge is extremely crappy. In case you are wondering how to get the graph shown, graph -sin(x) with the proper viewing window, then shade with 2nd-Calc, FnInt. Now I added the ports for communication. USB and I/O ports are generally made, but need to be refined. See the back. #84PSE #Calculator #Graphing_Calculator #TI84
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