The model LiftMaster 8355W door operator is manufactured by Chamberlain Group. The 8355W ½ HP Belt Drive Opener is a perfect choice if you want both quiet and smooth-running reliability, or simply have rooms positioned above your garage. The ½ HP heavy-duty motor is equipped with the patented Motor Vibration Isolation System (MVIS®) that eliminates powerhead vibration for reduced noise. As more convenient features, this opener also is equipped with built-in MyQ® technology that lets you monitor and control your garage door and house lights remotely by using a computer or smartphone with the available LiftMaster Internet Gateway. Meets all UL325 requirements.

• Works with MyQ; core features that allow you to control your garage door from anywhere, get activity alerts and set schedules are included with the MyQ app.
• Built-In Wi-Fi® for the easiest way to connect the garage.
• Monitor and Control the opener from anywhere using mobile devices.
• Get reliable, durable and powerful performance with our P3 Motors™, which are specifically built for use in Garage Door Openers.
• 1/2 HP AC Motor is purposefully designed and built to last.
• Belt Drive system for quiet, maintenance-free performance.
• Motor Vibration Isolation System (MVIS®) provides quiet, reliable operation.
• Safeguard your household with Security+ 2.0™—with every click, a new code is sent to the Garage Door Opener, so the door opens only for you.
• Alert-2-Close signals when a door is being closed by MyQ®.