It’s never been easier. or more fun to keep kids on track with this unique lighted electronic timer. You can easily program green, yellow, and red sections and six sound effects to indicate that time is running out. With 180 degrees viewing, it teaches time management. This kit is perfect for study sessions, tests, practice sessions, cooking, projects, experiments, classroom assignments and hearing impaired. Requires adapter (15691) or 4 AA batteries, not included.