Chamberlain 828LM Quick Start Manual page 3

To prevent possible SERIOUS INJURY or DEATH:
• When the LiftMaster
with a residential garage door opener, the opener
MUST ONLY be installed with sectional doors.
Before starting...
YOU MUST HAVE:
• Router
• Broadband Internet Connection
• Internet Gateway Serial Number (located on the
bottom of the Internet Gateway)
®
Internet Gateway is used