Engage your students in a fun and competitive way with the Learning Resources Answer Buzzers. This set of four allows you to create a game show environment in your home or classroom, inspiring learning at all ages. Designed for the classroom, these buzzers are extremely durable and will withstand years of use. These answer buzzers will up your teaching game and provide years of dependable use. Constructive Playthings is committed to providing safe, compliant products and a healthy, safe working environment worldwide. We require that all products meet all applicable federal regulations, which we review on a continuous basis.To clean, wipe the surface of the unit with a dry cloth