Transmitter Solutions Firefly 300MCD21K Garage Door Opener Keychain Remote

The Firefly 300MCD21K Keychain Remote offers a compact and dependable solution for controlling your garage door or gate access system. Operating on a 300 MHz frequency, this single-channel remote is fully compatible with Linear Multi-Code systems, including 3060, 3070 remotes, and standard Multi-Code receivers.

Designed for portability and convenience, the 300MCD21K features a keychain-style body and a user-friendly 10 DIP switch configuration for easy, secure programming. The remote includes a built-in LED indicator to confirm signal transmission and is powered by a reliable 12V battery (included), making it ready for immediate use right out of the box.

Key Features

• Part Number: 300MCD21K3

• Alternate Part Number: CCF3001B

• Frequency: 300 MHz for long-range, secure operation

• Coding System: 10 DIP switches for manual code setup

• Compatibility:

  • Linear Multi-Code 3060

  • Linear Multi-Code 3070

  • Multi-Code garage door and gate receivers

• Design:

  • Compact, keychain-sized transmitter

  • Single-channel operation

  • LED indicator confirms successful transmission

• Power Source: 12V battery (included)

Applications

• Residential and commercial garage doors

• Automated gate systems

• Multi-Code compatible access points

• Portable solution for vehicles, bags, or keyrings

Benefits

• Easy DIY programming with 10 DIP switch code settings

• Ideal for replacing lost or broken Multi-Code remotes

• Compact and durable for everyday use

• Quick visual confirmation with LED

• Strong signal range and low interference at 300 MHz

The Firefly 300MCD21K is a cost-effective and secure remote control designed to work seamlessly with Multi-Code systems, providing reliable access control in a compact form factor. Whether you're replacing a lost remote or expanding your system, this keychain remote is a smart, easy-to-use solution.