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