Portable: Mini electronic game console, also functions as a keychain, can be hung on a bag for easy carrying and convenient play anytime. Memory Training: Memory game machine toy that challenges users to follow light sequences, helping to develop memory and hand-eye coordination through interactive button gameplay. Competitive Game: Electronic memory game allows you to play against friends and strive for new high scores; enjoy head-to-head challenges to determine who achieves the highest score. Durable Material: Video game device made from high-quality materials with a round design, smooth edges, and comfortable grip, built to withstand regular use. Creative Gift: Memory training game toy makes an engaging birthday or holiday gift for children, boys, and girls. Size Chart: Diameter 5.5cm / 2.17inch Package Includes: 1 x Electronic Memory Game Note: Slight measurement variations may occur due to manual measurement and differences in display monitors.