The Firefly 300MCD22K is a two-button keychain transmitter designed to operate Linear Multi-Code 300 MHz systems used on many residential and commercial gate operators and garage door openers. Engineered as a dependable replacement or upgrade remote, it provides two independent channels so you can control two separate operators or receivers from a single fob. It is ideal for users seeking a compact Multi-Code compatible remote for everyday access control.
Operating at 300 MHz, the 300MCD22K uses classic Multi-Code on/off DIP-switch programming, allowing each button to be coded to match the receiver’s DIP-switch pattern for quick, tool-free setup. This model is compatible only with 300 MHz Multi-Code format receivers and operators; it is not compatible with Linear MegaCode, Delta-3, or rolling-code systems from other brands. Typical use includes pairing each button to a different gate or garage door, or programming both to separate channels on a multi-channel receiver. For best results, match the DIP-switch code(s) in the remote to the corresponding receiver channel(s) and test operation at a safe distance, ensuring the door or gate area is clear during programming.