Manual mode

Great volume!

Microphone mode only measures volume. It does not record or store audio.

Green streak: 0 minutes

Switches back to green right away and clears the red countdown.

Sets the current room noise as the quiet baseline for auto mode.

Muted Turns sound alerts off while keeping visual light changes active.

Pro Widget

Demo

Noise Traffic Light

Set clear classroom volume expectations with a large traffic light and teacher-controlled status changes.

Manual mode demo

Try Green, Yellow, Red, reset, mute, and green streak behaviour.

Auto microphone mode in Pro

Optional volume-only detection uses the browser microphone without recording audio.

Friendly visual cues

Green glows, yellow warns, and red shows a clear reset state for the class.

Sensitivity and calibration

Adjust expectations for whisper, partner, group, or presentation voice.

Resizable on display

Resize it on the Classroom Display so the traffic light suits your room.

Demo mode is manual only. Full Pro access unlocks Classroom Display use and optional microphone auto mode.