Liftmaster TX2EV/TX2EVS/TX4EV/TX4EVS/TX4UNI/TX4UNIS 433.92MHz Garage Door Remote Control Duplicator Door Opener Compatible with: LiftMaster TX4UNIS Liftmaster TX2EV TX4EV LiftMaster TX2EVS TX4EVS Liftmaster TX2REV TX4REV Specifications: 1. Number of channels: 4 2. Code: rolling code and fixed code 3. Frequency: 433MHz, 433.92MHz 4. Battery: CR2032 5. Size: 60*30*12mm 6. Color: Black + silver Up to 4 different remotes in ONE! Each button can be programmed as a replacement for a different remote, so using only one transmitter you can control up to 4 devices. Programming type: clone the original remote control; after cloning, you need to program on the receiver. Easy to use. This is a programmable remote control that copies the signal from your original remote control. If your remote uses a fixed code, the new remote will work after cloning. If your remote uses a rolling code, the new remote must be programmed or activated at the receiver after cloning. Detailed instructions are included in the package. Includes: Remote Control Battery Keychain English Manual