The single-channel keychain remote is powered by a long-lasting 12V battery and features an LED light to indicate operation and to aid with testing. To program your garage door opener, locate your eight dip switches, which can be found in the battery compartment, and simply set the switches in the identical position of the remote and receiver you wish to program it to. To ensure our customers receive the 310LID21K quickly, we typically ship the device within one business day.