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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
chamberlain_940d_om.pdf

(0.57 MB in English) This requires Acrobat 10 or higher