LIFTMASTER model 61LM transmitter. It transmits using on frequency 390 MHz. It has 1 button(s).
The warranty on the 61LM garage door transmitter is 1 year from LIFTMASTER.
The model 61LM is still available.
LIFTMASTER model transmitter instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
liftmaster_61lm_om.pdf
(0.11 MB in English) This requires Acrobat 10 or higher