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This is a modern clone of a "Citizen SRP-320G" graphing calculator from year ~2000 (and that Citizen model was itself a somewhat buggy* clone of an "a OK" budget graphing "Casio fx-6300g" from 1991-93). Cheap plastic, archaic interface (must have been great back in ~1991, though). In no way this is a TI-83+ comparable model. This "Truly TG204" misses functionality of Matrices, Probability distributions, PC connectivity and additional apps installations,that are among the things that I've noticed (and that TI-83+ actually offers!). In short: for <$10 - great. Definitely not worth >$15. *same arcsin bug as the SRP-320G, in forensic algorithm the last arcsin function entry unexpectedly switches itself into Radian mode, while been started in Degree mode.
Verified purchase: No