This abacus features a -click reset function, making it convenient for repeated use during math exercises. The 15 rods and 7 beads configuration is for teaching children of bead arithmetic. By sliding the beads up and down, students can practice addition, subtraction, multiplication, and division, enhancing their mathematical proficiency and confidence. Features -Color:Black -Material:Plastic -Size:27.00X11.00X2.00cm/10.61X4.32X0.79in -Convenient onekey reset: the abacus a onekey reset feature, allowing for quick and of calculations, enhancing efficiency during learning sessions -Childfriendly design: featuring 15 rods and 7 beads per rod, this abacus is tailored for children's use, making learning math fun and engaging -Mental arithmetic : designed as a tool for mental arithmetic, this abacus helps children improve their calculation skills and mathematical thinking -plastic construction: crafted with meticulous attention to detail, this abacus is built to last, providing a reliable tool for continuous educational use -Beginnerfriendly: its straightforward design ensures that even beginners can quickly learn how to use the abacus, making it an excellent starting point for young learners Package list: 4 x abacus