1.Reliable and Portable: Kids calculator is made of ABS , which is skin friendly and durable, with LCD screen, clear voice prompts, and portable size.  2.AAA Battery Power: Kids math calculator requires 3 AAA batteries to start using. Does not support charging, you can replace AAA batteries to use by yourself (AAA batteries are not included, please bring your own) . 3.Play Method: Select your skill, choose your game (practice or challenge), read the questions and enter your answers, then make a sound to indicate correct and incorrect answers and track your success.  4.Educational Toy: Versatile includes addition, subtraction, multiplication and division tests, math games, math formulas, time limit tests and more to encourage your child to learn. 5.Holiday Gift: Educational math toy is suitable as a gift for children at Easter, Halloween, Children's Day, parties, birthdays, etc.