EL-531TGBBW Scientific Calculator with 2 Line Display -- This model is perfect for students studying general math and science, pre-algebra, algebra, geometry, trigonometry, statistics, biology, and chemistry. Large 12 Digit, 2 Line LCD Display. Direct Algebraic Logic (D.A.L.). 273 Functions. 2 Modes: Normal & Stat. Home Key Allows Users To Start Fresh From Any Screen. Durable, Gloss Black Finish with White Accents. Acrylic Display Protection Prevents Cracks. 3D Light Reflecting Cover. Solar & Battery Powered.