Primary Concepts™ Hour Glass Classroom Timer & Noise Controller

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.

• 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
• Requires 4 C batteries or optional AC adaptor (sold separately)
• One year unconditional warranty