Primary Concepts HourGlass Classroom Timer and Noise Meter (discontinued) option3-name-washable This set includes ten weighted

This set includes ten weighted

Requires 3 AAA batteries

Exercise legs

Die-cut pieces including: 2 robots

pencils and other art materials

Primary Concepts HourGlass Classroom Timer and Noise Meter (discontinued) option3-name-washable This set includes ten weightedHourGlass 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 or optional AC adaptor (sold separately). Battery life in a typical classroom operation is 6 months 2 years, but varies according to usage. 15 x 8 x 4. 5. Instruction