| Device | CO2-Ampel | CO2-Ampel Plus | CO2-Ampel Pro |
|---|---|---|---|
| CO2 Sensor | Sensirion SCD30 | Sensirion SCD30 | Sensirion SCD30 or SCD41 |
| Air Pressure Sensor | - | - | yes |
| Light Sensor | yes | yes | yes |
| RGB-LEDs | yes | yes | yes |
| Speaker | yes | yes | yes |
| WiFi/WLAN | - | yes | optional |
| LoRa | - | - | optional |
| Power Connector | USB-C | USB-C | USB-C |
| Size | 5x5cm | 5x5cm | 8x8cm |