‣ Textbook-Style Display: Mimics The Appearance Of Equations And Results In Textbooks For Clear Understanding. ‣ Memory & Variables: Offers 9 Variable Storage, Independent Memory, And Answer Memory With Protection. ‣ Power Supply: Approximately 3-Year Battery Life With Auto Power-Off Feature. ‣ Accessories: Comes With A Hard Case And Features Plastic Keys. ‣ Calculation Capabilities: Supports Basic, Bracket, Fraction, Degree-Minute-Second, Reciprocal, Percent, Factorial, Π, √, Matrix, And More.