Great combination of advanced scientific functions & advanced technology in a durable solar powered calculator. Ideal for algebra 1 & 2, geometry, trigonometry, statistics, calculus, computer science, biology, chemistry, physics & engineering. Never needs batteries-operates in low light without them! Power Source(s): Solar; Display Notation: Engineering; Numeric; Number of Display Digits: 10; Display Characters x Display Lines: 10 x 1.