The LiftMaster 33LM is a three-button visor digital code switch type radio control transmitter that features color-coded push buttons for easy identification. This LiftMaster 33LM remote is typically used for commercial applications that require an Open, Stop, Close version of remote control and is ideal for use with the LiftMaster 423LM three-channel radio receiver operating on the 390MHz frequency. These color-coded buttons make it easy to identify the open, stop, close, buttons of the remote control. This LiftMaster 33LM remote is compatible with older LiftMaster, Chamberlain and Sears Craftsman garage door openers that use the 8 or 9 three position (+, 0, -) type of code switches on the garage door opener or has a Yellow, White, or Gray Learn button on the back of the garage door opener manufactured between 1984 and 1992. The LiftMaster 33LM can also be used with the billion code models of garage door openers that have the Green Learn button manufactured between 1993 and 1997 on the 390MHz frequency. Code switch number 1 is not active on this remote as the three buttons represent the +, 0, and - settings of code switch 1. This remote can be used to replace any of the models of remotes listed to control up to three garage door or gate openers or one three-channel code switch type radio receiver. This item is new in box and includes visor clip, battery and programming instructions.
The LiftMaster 33LM can replace the LiftMaster 50LM, 53LM, 54LM, 61LM, 62LM, 63LM, 64LM
Chamberlain 50, 53, 54, 750CB, 753CB, 756CB
Sears Craftsman 139.53708, 139.53778, or 139.53778 remotes to control up to three devices.
Note: Will not work on openers or remotes that end with a "C" used in Canada operating on 315MHz. Use the 333LM that operates on 315MHz available in our store.
Activates up to three code switch garage door openers or radio receivers or one LiftMaster 423LM three channel receiver on the 390MHz frequency
Red LED light indicates signal transmission and battery strength
Visor clip included
One-Year manufacturers warranty
Power: 12 volt A23 type battery included
Codes: 9-trinary (+, 0, -) code switches with 19,683 combination's
Dimensions: 3.5 x 1.6 x 0.6 inches
If you are not positive that this is the correct item for you, please email us. We are more that happy to assist you in determining the correct item for you. If you need to contact us for assistance please have the Make and Model number of the garage door opener, radio receiver or transmitter. We would rather have you contact us than end up with the wrong item and have to return it.