The Linear ACT-21A MegaCode Single-Channel Key Chain Remote (ACP00607) is a compact, one-button transmitter designed to operate a single garage door opener, gate operator, or access control receiver using Linear/Nortek’s MegaCode technology. Operating on the 318 MHz MegaCode format, it is factory-programmed with a unique identifier for secure, learn-code enrollment, making it an excellent replacement remote or add-on for residential and commercial applications. The key chain design keeps everyday access close at hand, and an LED provides visual feedback during transmission.
This transmitter is compatible exclusively with Linear/Nortek 318 MHz MegaCode receivers and operators; it does not work with other radio formats. Typical setup involves placing the compatible receiver into Learn mode and pressing the remote’s button to enroll—refer to your operator or receiver manual for exact programming steps. Use only where proper entrapment protection is installed and activate doors or gates only when in view and clear of obstructions. Model: ACT-21A; Part: ACP00607; Frequency: 318 MHz MegaCode. Common use cases include replacement for lost remotes, adding users to an existing system, and expanding access for homeowners, gated communities, and commercial sites already equipped with MegaCode-compatible hardware.