Iirc the laseregg works fine with no connection. It can be connected, but isn't necessary. My co2 sensors have no connection either: https://www.amazon.com/Hyd

Iirc the laseregg works fine with no connection. It can be connected, but isn't necessary. My co2 sensors have no connection either: https://www.amazon.com/Hydrofarm-Autopilot-Desktop-Monitor-Logger/dp/B01FYWU2IS/ref=mp_s_a_1_3?keywords=co2+monitor&qid=1557334844&s=gateway&sr=8-3 https://www.amazon.com/Hydrofarm-Autopilot-Desktop-Monitor-L...