Reliable and Portable: Kids calculator is made of ABS, which is skin friendly and durable, with LCD screen, clear voice prompts, and portable size 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) 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. (See the manual for more information) 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 Holiday Gift: Educational math toy is suitable as a gift for children at Easter, Halloween, Children's Day, parties, birthdays, etc Shell Material: Raw ABSDisplay: black and white digital display Product function: addition, subtraction, multiplication and divisionApplicable age: 3-9 years oldKey Material: Food Grade Silicone Battery: Three "AAA" BatteriesPackage Dimensions6.69 x 3.94 x 1.18 inchesItem Weight4.2 ounces