Allstar MVP 639T 9-Door Transmitter
Can control nine garage doors with the open, close, and stop buttons.
Can control up to 27 garage doors with single-function buttons.
Has a 1-9 switch to select the garage door.
Uses 8 trinary DIP switches, but is compatible with MVP Quick-Code receivers.
3-5/8" X 6-5/8" X 2-3/8"
One 9V battery included.
For use with openers operating at 318MHz.