This Texas Instruments TI-Nspire Graphing Calculator comes with a Ti 84 keypad and has been thoroughly tested. It is a handheld calculator with a regular-sized LCD display and is programmable. It has key features like calculus and is powered by batteries. The calculator is suitable for use in offices, businesses and industries. Its brand is Texas Instruments and it falls under the categories of office equipment, calculators, office and business & industrial.