This 2-in-1 classroom timer and noise controller times tests, games or any classroom event! The noise meter shows your children their noise level, and helps them understand the concept of time, and noise. HourGlass is a dual-function classroom management system that can be used as a Timer and as a Noise Detector.
The giant display of lights is a dynamic measuring tool that can be seen by everyone in a classroom or even an auditorium. Requires 4 "C" batteries or optional AC adapter. Battery life in a typical classroom operation is 6 months- 2 years, but varies according to usage. Measures 15" x 8" x 4.5". Ages: 4+.