LIFTMASTER model 373W transmitter. It transmits using on frequency 315 MHz, Security plus (315 MHz). It has 3 button(s).
The warranty on the 373W garage door transmitter is 1 year from LIFTMASTER.
The model 373W is discontinued.
LIFTMASTER model transmitter instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
liftmaster_373w_om.pdf
(0.17 MB in English) This requires Acrobat 10 or higher