LiftMaster 841LM Automatic Garage Door Deadbolt Lock, Powered by myQ Technology

Protect your facility or home with dependable, automated garage door security. The LiftMaster 841LM automatic garage door deadbolt lock delivers consistent, tamper-resistant protection by locking and unlocking in tandem with your opener—eliminating missed locks and human error. Built as a 12V electric deadbolt accessory, the 841LM is UL-tested and includes a manual release for safe access during power outages or service. Pair it with the MyQ ecosystem to enable remote monitoring, push alerts and secure surveillance integration for operations that require active oversight.

Installers and security managers will appreciate audible confirmation when the deadbolt engages, plus the ability to add a lock on each side of the door for enhanced storm and wind defense. The 841LM is engineered to integrate with select LiftMaster 12V opener models, making it a straightforward add-on to existing gate operator setups and garage security systems. Ideal for commercial properties, gated communities, and high-value residential sites that demand reliable perimeter control.

Upgrade your access control strategy with a smart, monitored deadbolt—order the LiftMaster 841LM to strengthen garage security and streamline monitoring today.

• Automatic, myQ-enabled deadbolt secures the garage every time the door closes for hands-free protection
• Remote monitoring and status alerts via the MyQ app for real-time security oversight
• Audible engagement confirms the lock has seated, reducing uncertainty at every operation
• UL-tested reliability with manual release for safe access during power or emergency situations
• Designed for storm and high-wind defense—install dual locks for reinforced protection
• Direct compatibility with 12V LiftMaster opener models for seamless integration into existing systems