2-in-1 classroom timer and noise controller.
* Times tests, games, any classroom event
* Too loud.
* HourGlass lets them know.
* Visible and audible for the entire classroom
* 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.
* One year unconditional warranty.
* Requires 4 "C" batteries (NOT INCLUDED) or optional AC adaptor.