Texas Instruments TI 84 Plus Graphing Calculator With Guerrilla Military Grade Screen Protector Set (Certified Refurbished) Graphing calculator handles calculus, engineering, trigonometric, and financial functions USB on-the-go technology for file sharing with other calculators and connecting to PCs Includes all accessories + CD manual + 4 brand new AAA batteries. Includes Guerrilla military grade screen protector set Certified Reconditioned. Looks and works like new.