NOT COMPATIBLE WITH GARAGE DOOR OPENERS OR GATE OPENERS THAT DO NOT CURRENTLY USE THE 811LM, 811LMX, 813LM OR 813LMX MODEL REMOTES LiftMaster model 811LMX replaces the 811LM is a one button 12-code switch digital encrypted visor remote control that uses the narrow band tri frequencies (310, 315 and 390MHz) for better range and is compatible with LiftMaster 850LM and 860LM radio receivers and commercial openers with Security+ 2.0 technology. This remote has 12 on/off code switches and transmits a digital encrypted signal rather than a standard digital signal to provide additional security. With the LiftMaster 811LMX remote once the receiver has learned the signal of one of the remotes, additional remotes can be added without having to have the receiver learn from the remote again as long as the code switches are set to the same code switch settings. This item is new in box and includes visor clip, battery and programming instructions. The LiftMaster 811LMX remote is directly compatible with the 850LM and 860LM radio receivers and commercial openers that use the Security+ 2.0 system. Product Specifications: Power: 3 volt lithium battery CR2032 included Frequency: Tri-frequency 310, 390 and 315MHz Codes: 4,096 set by 12 on/off code switches Dimensions: 3.125 x 1.75 x 0.625 inches (excluding visor clip)