The Philips 867041 CO2 extension module cannot be used in a stand alone capacity. It will not directly connect to a Philips monitor. It must be connected to a MMS, X2, MP2, MMX, X3 to work properly. This module has MSL connectors going to the monitor and then an additional connector to the patient module. Sidestream CO2 comes standard and you can add invasive pressure, temp, and CCO if needed. We see sidestream CO2 failures including occlusion, leak test failure, and CO2 equipment malfunctions. We also see communication or power issues.