LIFTMASTER model 971LM transmitter. It transmits using on frequency 390 MHz, Security plus (390 Mhz). It has 1 button(s).

The warranty on the 971LM garage door transmitter is 1 year from LIFTMASTER.

The model 971LM is still available.

LIFTMASTER model transmitter instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE

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