Chamberlain 750CB 1-Button Remote = LiftMaster 61LM 1-Button Remote
Use with all models older than 1993 having DIP switches or yellow, gray or white learn Button as shown below
or 
The Chamberlain 750CB 1-button garage door opener remote control from Garage Door Supply Company is for use with Chamberlain remote garage door openers made before 1993. This Chamberlin dip switch remote is also compatible with pre-1993 LiftMaster and Craftsman garage door openers with dip switches or yellow, gray or white learn buttons.
The Chamberlain model 750CB remote control transmitter is interchangeable with the LiftMaster 61LM 1-button remote, which is also made by Chamberlain. Both remotes have 9-position trinary dip switches with over 19,000 digital codes. A red LED light on the remote transmitter indicates battery strength. The Chamberlain garage door opener remote comes with a car visor clip and 12-volt battery.
Product Highlights:
- 750CB/61LM
- Compatible with pre-1993 Chamberlain, LiftMaster, Craftsman garage door openers with dip switches or yello9w, gray or white learn buttons
- 1-button controls one garage door or gate
- 9-position trinary dip switch programming
- 19,000+ digital codes
- Red LED battery strength indicator light
- Comes with car visor
- 12V battery included
DOES NOT WORK FOR NEW LiftMaster or Chamberlain Openers with Yellow Smart Buttons
Chamberlain and LiftMaster are the Same Company, Chamberlain is the retail name found in box stores such as: Home Depot, Lowe's, Menards etc. LiftMaster is the Professional Grade name carried by professional garage door dealers only. Garage Door Supply Company is a Professional garage door dealer and we carry only the LiftMaster brand.
The equivalent LiftMaster product will likely be substituted but it will work great with your garage door opener.