The Linear ACT-21A is the current and only made one button remote that replaces the ACT-21A MegaCode remote. This remote works with all MegaCode series type garage doors or gate openers that have fixed codes using the 318MHz frequency. The ACT-21A Linear remote controls one garage door opener or gate operator. This is a new item that comes from our bulk purchase pack. This means that it is wrapped in a plastic bag (no box). The remote comes with a key ring, installed battery and programming instructions.
ACT-21A transmitters do not contain a typical “coding switch”. Each transmitter is permanently coded at the factory to a unique code. The receiver is programmed by making it “learn” the transmitter’s unique digital code. The receiver will activate only from these “memorized” transmitters.
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