No need batteries, no need other electronic power supply, this is a 12 Digits Desktop Solar Cartoon Speech Calculator.This cartoon speech calculator is with 12 digits big subtitles display, and features solar dual-supply driver, and it is very special and charming. At the same time, the 12 digits desktop solar calculator has basic calculating function and can be used for daily calculation in home, school, office and so on. Made of high quality material, the desktop solar calculator provides excellent durability and reliability! Most important, the desktop solar calculator is powered by solar, more environmental, also save a lot for you!Practical and reliable, best solar calculator for you, do not miss it!