The Sharp EL-520TGGY scientific calculator contains 400+ functions and is suitable for use in secondary schools and universities. Features solar or battery operation and clear 2-line display. Hard plastic protective cover protects the calculator from scratches and drops. Main features: Scientific school calculator with direct algebraic input logic (D.A.L.), large 12-digit display, 2 lines, 400 functions, solar / battery powered (solar operation with backup battery LR44), navigation keys, recall entries and. Technical data and specifications: Decimal place programming (FIX, SCI, ENG), multi-line playback, thousands subdivision, store last result (ANS), clear calculations and memory (CA), convert fraction - decimal and vice versa / polar -.