Features: 1.417 Functions: This scientific calculator provides 417 calculation functions that can meet almost all your daily calculation needs, suitable for students and researchers. 2.Large Display: This desk calculator is designed with large screen which can clearly display the numbers and results, providing the same display expression as textbook. 3.Sliding Cover: This office calculator is equipped with a sliding cover, on which is printed with scientific constants and unit conversions for reference, offering more convenience. 4.Compact Size: This desktop calculator in light weight and compact size is an ideal choice for finance, office, accountants, school and home. 5.Battery Powered: This small calculator is powered by 1 40mAh LR03 AAA batteries(inbuilt battery included). Premium ABS material is light and highly durable. specification:Item Type: Scientific Calculator Material: ABS Battery: 1 x 40mAh LR03 AAA Batteries(Inbuilt Battery Included) Purpose: Multi Functional Scientific Function Calculator PackageList:1 x Scientific Calculator 1 x User Manual