LIFTMASTER model 83LM transmitter. It transmits using on frequency 390 MHz. It has 3 button(s).

The warranty on the 83LM garage door transmitter is 1 year from LIFTMASTER.

The model 83LM is still available.

LIFTMASTER model transmitter instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
liftmaster_83lm_om.pdf

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