Please note this is the original Casio FX-9860GII graphic calculator as it is approved for use within the UK. All other FX-9860GII products that are listed without any of the following barcodes (as on the back of the packaging) 4971850034155, 49718500341555 or 497 1850186090 may not be suitable for use within UK education. Recommended for advanced studies, the Casio FX-9860GII contains all the features you would expect from a modern graphic calculator, its fast, powerful and features natural textbook display, USB port and 1.5MB flash ROM. This ever popular model now features a large 64 x 128 pixel monochrome display, icon menu for easy mode selection and is equipped with geometry and dynamic graphics, spread sheet and e-activity features. Main features: 3 year guarantee Perfect Natural V.P.A.M. - Natural input and output EQUA mode, integral/probability function, logical menu function for easy operation, reference and pref command lines for levels or reduced row level form Xc<(inequality), graphical mode, probability function in run mat application, integral graphing (in graph mode), random unit conversion On a GCD (A A gcd/LCM (ppcm) function chart (in STAT mode) Mod function (remainder) Chi-Squared GOF function financial applications Additional financial function - Binding calculation, Deep-Geometry Add-In pre-installed backlight function E-CON2 (communication program for EA-200) Scientific applications with physical constants (AD. calculcalculwith scientific numerical notation financial mathematics geometry (pre-loaded d) periodic table applications (ADD-in) physium programming function. Other models to be considered: If you need an even more powerful and advanced graphic calculator, consider Casio most advanced graphic calculator, the FX-CG20. The FX-CG20 has a larger colour display and even more advanced features.