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Price:
$59.95
A self-monitoring traffic light sound meter. The green light stays lit until noise in the classroom goes above the set level (determined by teacher), green light then goes off and flashing yellow light comes on as a warning. When the sound level rea... More. |
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Price:
$99.95
A self-monitoring traffic light sound meter with remote control. The green light stays lit until noise in the classroom goes above the set level (determined by teacher), green light then goes off and flashing yellow light comes on as a warning. When... More. |
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