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MARANTEC model M13-631 keyless entry. It transmits using billion code on frequency 315.

The warranty on the M13-631 garage door keyless entry is 1 year from MARANTEC.

The model M13-631 is still available.

MARANTEC model keyless entry instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
marantec_keyless_om.pdf

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