The model LiftMaster 8355W door operator is manufactured by Chamberlain Group. The 8355W ½ HP Belt Drive Opener is the 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.