Usage Tips:Description: [Stimulate learning interest]: Quiz Game Beeper System is designed to stimulate children's curiosity and enthusiasm for learning through its fun and competitive nature, making education an enjoyable experience [Enhance cognitive ability]: Beeper Button helps to develop basic cognitive abilities such as attention, memory, reaction time and logical thinking, providing a comprehensive brain exercise for young people [Promote social interaction]: Educational Toy adopts multiplayer mode to promote social interaction and teamwork among children, helping them build communication skills and collaborative spirit [Material and compact design]: Teacher Supplies is made of sturdy pp, and each buzzers measures 9.2cmx9.2cmx4cm/3.62inchx3.62inchx1.57inch [Set]: The set includes four buzzers, suitable for classroom quizzes or family game nights Specification: Material: Pp Size Chart: 9.2cmx9.2cmx4cm/3.62inchx3.62inchx1.57inch Package Includes: 4 Beeper Buttons Note: Please allow 1-3mm differs due to manual measurement.