The Sci-Plus Series 200 Scientific Calculator is a large display calculator designed for use by individuals with low vision. This calculator performs scientific, statistical, and trigonometric calculations. It features a high- contrast liquid crystal (LCD) display in a rugged, portable case. The positive activation keypad has enlarged, proportional numerals with color-differentiated operation keys. A large print owners manual is included. POWER: Uses lithium-ion battery or standard current. A country-specific power adapter and universal recharger are included. Additional country-specific plugs are available on request. DIMENSIONS (HxLxW): 1.3 x 6 x 9 inches. Keys are 0.7 inches wide with numerals measuring 0.9 x 0.6 inches. WEIGHT: 14 ounces. COLORS: Ruby red, blueberry, cash silver, bumblebee yellow, or lime green case with black number keys and blue arithmetical operation keys. Numerals and arithmetical operation signs are white; other operations are white or yellow.