Nice Combination: the package comes with 12 pieces of calculators for students in 4 different colors, including rosy, black, blue, and purple, can meet your different needs for cl and daily office use Large Lcd Display: our pocket calculator is designed in 8 digit LCD display that provides optimal viewing angle, and each one is equipped with reasonable multi function designs, such as addition, subtraction, multiplication, division, sum, percentage, and so on, which will be a practical tool for you Dual Power: this small calculator can be powered by y or solar energy, and the screen can be charged by sunlight to maintain the power of the solar y, so there is no need to worry about the y running out when going out; Note: when the calculator is powered by y, you need to prepare y by yourself Pocket Size: these mini calculators measure about 115 x 65 x 20 mm/ 4.53 x 2.56 x 0.79 inches, small and lightweight, so they can be put in the bag or in your pocket at any time, allowing you to use it at any time Reliable and Reusable: the pocket size calculator is made of quality materials with buttons that are comfortable to use, reliable and reusable, which can serve you for a long time