The HP 10s+ Scientific Calculator is durable with a user-friendly design, easy-to-read display and a wide range of algebraic, trigonometric, probability and statistics functions for your math and science classes. Enjoy a long-lasting calculator with solar power plus a battery backup so you can work in low-light conditions. Help protect your HP 10s+ from bumps and drops with the durable slide-on cover. View expressions and results simultaneously on a 2-line, 10-character display. Work smarter and faster with dedicated keys for common calculations including percentage, pi and sign change. Store and recall important results and data fast with the easy-to-use memory keys. Display decimals between -1 and 1 in your choice of either exponential or decimal format. Ideal for examinations - adjust the number of decimal places displayed with the touch of a button.