A self-monitoring traffic light sound meter. Green light turns to yellow as a warning, and then turns to red as noise in the room goes above the level set by the teacher. Decibel sensitivity is from 50dB to 110dB. Optional audible “quiet pleas..
Product Number: SN00172M
Deluxe Yacker Tracker®
A self-monitoring traffic light sound meter. Green light turns to yellow as a warning, and then turns to red as noise in the room goes above the level set by the teacher. With the remote you can put an end to climbing up and down to adjust th..
Product Number: PE05551M
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