The 333LM operates at 315MHz frequency and features Sec Plus technology for secure garage door control. Compatible with LiftMaster openers that support this frequency and security protocol. The remote provides reliable wireless operation for convenient access to your garage door system.
Dimensions: 3.00 x 2.00 x 1.00 (W x L x D, inches)
![Substitute for LiftMaster 333LM 315Mhz Sec Plus Garage Door Opener Remote Control [375UT-3button]](https://www.replacementremotes.com/store/images/liftmaster_333lm-315mhz-sec-plus_2.jpg)
