This educational abacus is designed to support of young mathematicians. The 15 rods and 7 beads setup is ideal for practicing various arithmetic . The reset feature ensures that students can quickly calculations without hassle. Features -Color:Black -Material:Plastic -Size:27.00X11.00X2.00cm/10.61X4.32X0.79in -Onekey reset functionality: the abacus includes a onekey reset feature, making it easy to clear calculations quickly, which is especially useful for young learners -Designed for children: with 15 rods and 7 beads per rod, this abacus is suited for children, helping them to understand and arithmetic - for mental arithmetic: this abacus is specifically designed for mental arithmetic, aiding in the development of children's calculation skills and cognitive abilities -plastic and durable: crafted with precision and plastic materials, this abacus is durable and reliable, ensuring longterm use and consistent performance -Easy for beginners: the simple and intuitive design makes it easy for beginners to learn and use, making it an ideal educational tool for young students Package list: 4 x abacus