The SHARP® EL-531XTBWH is twin powered (solar & battery backup). Advanced 2 line scientific calculator with Direct Algebraic Logic (D.A.L.) display, allows calculations to be displayed as written on paper display. Perfect for students studying general math & science, pre-algebra, algebra I & II, geometry, trigonometry, statistics, biology, chemistry, and physics. Features include: 2 Modes: normal & stat; 8 Temporary memory buttons; and 1 & 2 Variable statistics. Durable, gloss black finish with white accent. Protective hard case. 3-5⁄16"W × 5-5⁄16"H × 5⁄8"D. 10-digit scientific calculator with a two-line display performs 272 functions, two variable statistics, fraction, constant and regression calculations to help you quickly work through a wide variety of problems. Dual-power design runs on both solar energy and battery power to ensure consistent, reliable performance no matter where you are. The home key allows you to quickly start fresh from any screen. Scientific calculator is perfect for pre-algebra, algebra, statistics, chemistry and more. General Information Manufacturer:Sharp ElectronicsManufacturer Part Number:EL531XTBWHManufacturer Website Address:http://sharp.ca/en/Brand Name:SharpProduct Name:EL531 Scientific CalculatorMarketing Information:10-digit scientific calculator with a two-line display performs 272 functions, two variable statistics, fraction, constant and regression calculations to help you quickly work through a wide variety of problems. Dual-power design runs on both solar energy and battery power to ensure consistent, reliable performance no matter where you are. The home key allows you to quickly start fresh from any screen. Scientific calculator is perfect for pre-algebra, algebra, statistics, chemistry and more. Packaged Quantity:1 EachProduct Type:Scientific Calculator Technical Information Number of Functions:272Operations/Functionality: Pre-algebra Algebra Statistics Chemistry Display & Graphics Number of Display Digits:10 Battery Information Power Source:Battery/Solar Physical Characteristics Color Family:BlackProduct Color:BlackHeight:0.6" (15.88 mm)Width:3.3" (84.14 mm)Depth:5.3" (134.94 mm) Miscellaneous Recycled:NoAssembly Required:No Product Numbers: EL-531XTBWH 074000019799 SHR01979 430660 SHREL531XTBWH