  
MegaCode 318 MHz digital transmitters are wireless radio controls designed for use with automatic garage and gate operators.
The MegaCode radio format provides unparalleled security. The format provides more than a million different codes. The MegaCode Transmitters and receivers 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 activates only from these memorized transmitters.
9 volt battery included. To conserve battery life an internal timer limits the transmission to 10 seconds.
Each button controls a different operation. Example: Two buttons open two MegaCode equipped garage doors openers.
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