It's so quiet that you can't even hear it over the background noise. This particular unit is an Amarr 860. These units are still available and known as the Linear 863b and 841. Belt driven, 3/4hp equivalent, wifi ready, dc motor... I want to say this one is 4100 lumens.
This garage door opener is lifting a Amarr Stratford 3000 garage door. The Stratford series has been discontinued to make room for the Lincoln series.