GENIE 3850R works very well with my GENIE receiver #315390R2 that I have operating an old Chamberlin opener.
The receiver was not included in the installation instructions but they were the same as the first (A) instructions you sent.
You probably know all this but just in case not I thought I would comment anyway.
Thanks
All my questions on the product were answered quickly, it was delivered very fast and the springs are great. In a nutshell, great service, delivery and product!
