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