This Multi Code Single garage door replacement radio receiver set includes (1) Multi Code model 1090 / 1090-20 Single Channel Radio Receiver and (1) Multi Code 3089 / 3089-11 single button visor remote control. This kis is designed for use in residential garage door operator applications. This unit is perfect for retro fit applicaitons where your remotes aren't working like they once did, but over all the opener still works great. Installation in most applications is a simple process, just mount the 1090 to the 3 screw terminals on the back of your opener. Once the receiver is mounted simply set the 10 on/off switches on the remote to match the same settings on the receiver and your ready to go.