Insert the card into the educational flash cards, a key cycle function, you can read and learn over and over again, without having to reinsert the card. 3.5 x 4.2 inches - perfect handheld size, toddlers can also use them independently. This learning toy comes with a built-in rechargeable battery that lasts for 6-8 hours and takes only 2.5 hours to fully charge, eliminating the need for frequent charging. The card reader weighs 78 grams and measures 4.5 * 3.3 * 0.5 inches with punched rounded corners and a waterproof coating, making it safe for children. The small learning card contains 112 cards - 224 pages, an ideal learning resource to help children learn the alphabet, colors, shapes and identify objects on the cards. The perfect learning toy for children under 9 years old to learn new words, train their hearing, expand their vocabulary and improve their cognitive abilities. The learning flashcard allows children to put down their mobile phones and I-pads. The screen-free design reduces the time for toddlers to touch the screen and takes care of toddlers' eyesight. Perfect option for teaching materials/classroom games/preschool/kindergarten class, homeschooling. Baby flashcards support USB charging, auto power off, adjustable volume. A fun way for children to learn their letters and shapes. Great learning toys for toddlers.