CHAMBERLAIN model 753 transmitter. It transmits using on frequency 390 MHz. It has 3 button(s).
The warranty on the 753 garage door transmitter is 1 year from CHAMBERLAIN.
The model 753 is still available.
CHAMBERLAIN model transmitter instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
(0.13 MB in English) This requires Acrobat 10 or higher