Texas Instruments TI1706 SuperView Handheld Calculator - Dual Power, Sign Change, 3-Key Memory, Large Display, Slide-on Hard Case, Wall Mountable - Battery/Solar Powered - 8.2" x 4.5" x 1" - Gray - 1 / Each TI-1706SV

Eight-digit handheld calculator offers a color-coded keyboard, SuperView display for easy viewing, and extra-large, easy-to-use keys. Functions include square root and change sign (+/-) key to simplify entry of negative numbers. Included protective slide case is designed for safe storage in backpacks or briefcases. Calculator runs on solar and battery power.