Texas Instruments LPROFSOLAR Little Professor Solar Calculator Four basic operations: addition, subtraction, multiplication and division. Five levels of difficulty, from 'very easy' to 'very difficult'. Includes over 50,000 pre-programmed tasks. Awards a star for each correct answer and smiles when five sums are answered correctly. Robust housing and solar powered cells. <a href="https://www.amazon.com/b?node=14770868011"> International products </a> have <a href="https://www.amazon.com/gp/help/customer/display.html/ref=nav_cs_help?ie=UTF8&nodeId=202045290"> separate terms, </a> are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Manufacturer warranty may not apply <a href="https://www.amazon.com/b?node=14770868011">Learn more</a> about Amazon Global Store.