Just a quick heads up to anyone installing the 2 module combined devices. The device consists of a starbreaker RCBO with a Siemens AFDD tacked on the left side with manufacturer fitted links from the RCBO output to the incoming terminals on the AFDD. On a number of the ones I fitted recently the RCBO terminals had not been tightened by the manufacurer. This only became apparent at the end of the job and it was necessary to go back and check them all, several were loose.