Both of these units are not tested. I do not know what they do and I don’t have the needed equipment to test them. I did however power them on and all the lights are working. Beyond that nothing has been tested. The temperature compensating focuser is in good condition with a small mark on the out button. The front is labeled TCF but the back has a label TCF-S. The Maxfilter 2” appears to be in good condition but one of the rubber foot pegs is missing. They both have their power adapters but both are missing the cord that plugs into the wall. This bundle is being sold as is with no returns.