Battery power. 10 digit scientific calculator is perfect for students in General Math, Science, Algebra and Trigonometry. Hex/Dec/Oct/Bin and decimal degrees conversion. Logarithms, reciprocals, powers, roots, factorials, trigs, hyperbolic trigs and one variable statistical calculation. Hard folding shell cover. 2-5/8?W x 4-1/5?D x 1/2?H