How to read your Laser Egg display

The Laser Egg equips you with color-coded, at-a-glance and detailed readings for multiple air quality parameters. Get to know your device with this overview:

  • Display screens
  • Icons 

Display screens 

Your Laser Egg offers different display screens for various measurements. Press the Mode button located on the top of your Laser Egg to cycle between these screens to better analyze your air:


The Air Quality Index, more commonly known as the AQI, is an index for reporting daily air quality that ranges from 0-500. The higher the AQI value, the greater the level of air pollution and the greater the health concern.

For more information about AQI, feel free to take a look at our AQI wiki page.

PM2.5 concentration

Indicates the number of particles >0.3 μm per 0.1 L of air. For more general information about PM2.5 and how you can manage fine dust, check out our blog post on particulate matter

Particle count, temperature, and humidity

In order of appearance from top to bottom, the icons indicate the number of particles >0.3μm per 0.1L of air, temperature (in Fahrenheit or Celsius), and relative humidity.

The >0.3 measurement is an extra measure we provide for people who want to know more about the exact particle counts for research or testing purposes. In general, we recommend looking at the AQI or the PM2.5 concentration.

Local weather forecast and outdoor temperature

View three days of the weather forecast and current outdoor temperature.

Your Laser Egg will display local weather information and outdoor temperature on your Laser Egg based on your geolocation. After you connect your Laser Egg to the Kaiterra app, you can automatically see:

  • Your geolocation at the upper left corner of every front display,
  • Local weather forecast for the next three days on weather display, and
  • The outdoor temperature on the upper right corner of the weather display.

Note: This feature is only available for firmware version 1.4.1 and later. You can upgrade to this version via the Kaiterra app


Turn off the LCD display when dark. 

Overall Index (only available on the Laser Egg 2+)

The Overall Index is developed by Kaiterra to give you an at-a-glance, complete reading of your indoor air quality. It combines readings of both PM2.5 and TVOC concentrations. Based upon the AQI standards you chose in your Settings, the Overall Index calculates PM2.5 and TVOC concentrations independently and displays the higher of the two values, so that you know which pollutant to focus on.

This is similar to how the U.S. EPA calculates AQI, by looking at a range of pollutants and showing the pollutant with the highest readings. You can choose which AQI standard to use in the Kaiterra app.

TVOC concentration (only available on the Laser Egg 2+)

TVOC concentration as parts per million (ppm)


Battery Life

Battery Charging

              Standby Mode: It appears after 15 minutes of inactivity. The device will continue     to take readings and stream data to the cloud every minute.

           Not connected to Wi-Fi

            Connected to Wi-Fi

           Disconnected from Wi-Fi: To reconnect, bring the Laser Egg 2 closer to the Wi-Fi     source or reset the Wi-Fi password. 

Is the TVOC (ppm) reading the same as the Overall Index?

No, the TVOC (ppm) reading is not the same as the Overall index. The TVOC (ppm) reading is the “raw data” representing the concentration of VOCs in your air, while the Overall index is an index reading that combines both PM2.5 and TVOC (ppm) to give you a more comprehensive understanding of your air.  

Click here to read more about both TVOCs and Overall Index

Overall Index:

Laser Egg+ Chemical Overall Index TVOC High

TVOC Concentration (ppm):

Laser Egg+ Chemical TVOC(ppm)