Key Features: Screen: High-resolution LCD color display (65,000+ colors) showing up to 8 lines of text. 3D Graphs: Ability to visualize spatial figures and cross-sections. Python: Supports programming in the Python computer language. Natural V.P.A.M.: Formulas and fractions are displayed as they appear in math textbooks. Specifications & Usage Power Supply: Operates on 4 AAA batteries (not rechargeable via USB). Memory: 16 MB Flash ROM for storage and 61 KB RAM. Connectivity: USB port for connection to a PC or other calculators. With Protective cover and USB cable. The calculator is in very good condition with minor user traces. The calculator will be carefully packed.