On March 6, 2017 at 21:54, FreddyFreeloader said...
They must be talking about the ones with the little IR window. No RF. Tipped me off when he said it worked with a MX-850
Huh? MX-850's work perfectly with the URC/Lutron dimmers and switches directly via RF. No Ir involved. The dimmer tested was an MRFA-6MLV.
see...
[Link: ebay.com]URC product, no "little ir window"