Transmitter Solutions Firefly 390LMPB1K Garage Door Opener Keychain Remote

The Firefly3 390LMPB1K3 Keychain Transmitter is a compact, single-button remote designed for use with 390 MHz dip switch garage door and gate receivers. Its small form factor and keychain design make it convenient for everyday access control applications.

Engineered for compatibility, this remote transmitter works with all dip switch receivers operating at a 390 frequency with 10-dip switches, including all LiftMaster dip switch digital receivers and the LiftMaster 81LM. With simple programmability and reliable signal transmission, this keychain remote provides a practical solution for replacing or adding remotes to existing systems.

Key Features

• 390 MHz operating frequency for dip switch systems
• Single-button design with orange button
• Compact keychain-style remote for portability
• Programmable with up to 1 billion code combinations
• Compatible with LiftMaster 81LM and similar receivers
• Designed for use with 10-dip switch receiver systems

Specifications

• Operating frequency: 390 MHz
• Buttons: 1
• Battery: 12V A23 (included)
• Operating temperature: -20°F to 100°F
• Dimensions: 1-1/2" x 2-1/8" x 3/8"
• Weight: 1 oz

Compatibility

• LiftMaster 81LM
• Other 390 MHz dip switch receivers with 10 switches

The Firefly3 390LMPB1K3 transmitter offers a straightforward replacement option for older dip switch remote systems. Its compact size, reliable frequency, and broad compatibility make it suitable for residential and light commercial access control applications.