The Texas Instruments TI-30XA Gray Trigonometry & Scientific Calculator is a handheld device that is powered by batteries. It features an LCD display with a one-line display capability, making it easy to view calculations and results. This calculator is designed for scientific and trigonometric functions, making it a reliable tool for students, professionals, and anyone in need of precise calculations. The Texas Instruments TI-30XA comes with a cover for protection and convenience, and is a must-have for those in need of an accurate and efficient calculator for various tasks.