Model C: Connected CO2 sensor with integrated battery and storage

Model F: Simple portable CO2 sensor

Model D: CO2 sensor with integrated battery

Model E: All-in-One Solution for Smart, Connected Air Quality Monitoring

Model E-Lite: Complete, connected air quality sensor

Model G: Connected air quality sensor

Model X: Connected exterior air quality monitoring sensor

Maker Edition : Open-source, maker friendly CO2 sensor

Upgrade your older Model C or D to version 2