CHAMBERLAIN model 940CB keyless entry. It transmits using rolling code on frequency 390.
The warranty on the 940CB garage door keyless entry is 1 year from CHAMBERLAIN.
The model 940CB is discontinued.
CHAMBERLAIN model keyless entry instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
(0.30 MB in English) This requires Acrobat 10 or higher