CHAMBERLAIN model 940EV keyless entry. It transmits using billion code on frequency 315.
The warranty on the 940EV garage door keyless entry is 1 year from CHAMBERLAIN.
The model 940EV is still available.
CHAMBERLAIN model keyless entry instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
(1.07 MB in English) This requires Acrobat 10 or higher