The ACT-21A Linear One Button Key Chain Remote Transmitter is designed for garage door and gate operator control.
This ACT-21A Linear MegaCode Remote Transmitter is permanently coded at the factory. The remoter sends a unique code when the button is pressed. The remote is programmed by the receiver learning a remote's unique digital code. The receiver will activate only from the memorized remotes.
Linear ACT-21A Info: Activates One MegaCode Receiver 318MHz, Battery, Key Ring, Programming Instructions Included, Dimensions: 1.25” W x 2.25” H x 0.48” D