RAYNOR model 877MGX keyless entry. It transmits using billion code on frequency 310.
The warranty on the 877MGX garage door keyless entry is 1 year from RAYNOR.
The model 877MGX is still available.
RAYNOR model keyless entry instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
(1.86 MB in English) This requires Acrobat 10 or higher