Transmitter Solutions 390LMD21K3 Remote 390 MHz - 10 Pack

Compact 390 MHz Keychain Remotes Compatible with LiftMaster® 61LM

The Transmitter Solutions 390LMD21K3 Firefly³ 10-Pack delivers high-quality, compact keychain-style remotes engineered to replace the LiftMaster® 61LM and 9-dip switch receivers operating at 390 MHz. Designed for gates, garage doors, and access control systems, these remotes provide reliable long-range performance with quick dip switch programming for easy setup. Their durable design and weather-resistant build make them ideal for both residential and commercial environments.

Key Features

• Sold in packs of 10 for multi-user or large property applications
• LiftMaster® 61LM compatible and supports all 9-dip switch receivers at 390 MHz
• Portable keychain design with dark blue button and durable ABS housing
• Long-range reliable transmission for gates, garage doors, and access control systems
• Quick setup using dip switch configuration for seamless integration
• Efficient operation in extreme temperatures for indoor and outdoor use
• Battery powered with included 12V A23 battery for long service life

Technical Specifications

• Model Number: 390LMD21K3
• Frequency: 390 MHz
• Number of Buttons: 1 (Dark Blue)
• Battery: 12V A23 (included)
• Operating Temperature: –20°F to 85°F
• Dimensions: 1-1/2" × 2-1/8" × 3/8"
• Weight: 1 oz
• Warranty: 2 years

Conclusion

The Transmitter Solutions 390LMD21K3 Firefly³ 10-Pack combines ease of programming, compact portability, and reliable performance. Designed as a direct replacement for LiftMaster® 61LM remotes, these keychain transmitters ensure dependable access control for any 390 MHz dip switch system, offering the perfect blend of convenience and durability.