Autopilot Desktop CO2 Monitor & Data LoggerAutopilot Desktop CO2 Monitor & Data Logger is a highly innovative and user friendly device by Autopilot. It comes with a clear display that shows digital charts of relative humidity levels, memory logged carbon dioxide levels and temperature readings over 7 days or 24 hours. The device also comes equipped with a hook and loop fastener, which you can use to affix an external battery pack. Hook and Loop Fastener: This desktop CO2 monitor and data