One works but gets glitchy. One doesn’t turn on. Parts only. The product is a lot of two Texas Instruments TI-83 Plus graphing calculators with covers. These handheld calculators are powered by batteries and feature an LCD display, calculus functions, and are programmable. The Texas Instruments brand is known for its quality and reliability in the field of mathematics and computer science, making these calculators a valuable tool for students, professionals, and educators. Made in the Philippines, these graphing calculators are designed for regular use and are compact in size for easy portability.