The Liftmaster 833-1LM is a single add on intercom that provides convenient and expandable communication for your home.
•Up to 1,000 foot range – no power connection required
•Crystal clear, secure 900MHz digital communication
•High-tech design and modern look blends in with today's tech-friendly, contemporary homes
•Advanced features include voice activation and monitor mode
•Broadcast to all channels simultaneously or speak to one party with Secured Link
•Single or multi-channel communication
•Expandable with additional units (up to 12 per network) to enhance your home's communication to multiple locations
•Easy to use – installs in minutes
•2-year battery life; requires four AA batteries per unit (not included)
•1-year warranty
•Compatible with the following LiftMaster® wireless intercoms: models 833-2LM, 831-2LM