HP 35s Scientific Calculator Engineering, Surveying, Science, Medicine, Display type: LCD Adjustable contrast with 2 lines x 14 characters + indicators, 14 character dot matrix (5 x 7) SAT Reasoning Test; SAT Subject Tests in Mathematics Level 1 and Level 2; ACT; PSAT/NMSQT; AP Chemistry/Physics; PLAN; EXPLORE Built-in functions: Over 100, Memory registers: 800, Memory: 30 KB, Power: 2 x CR2032 batteries; battery life: 0.73 year @ 1 hr/day (approximately 9 months) Dimensions (W X D X H): 3.23 x 0.72 x 6.22 Inch. Warranty: 1 year warranty (may vary by region)