5. Exam the adjustments: Open up and close the door to be sure it stops and reverses at the specified positions. Make any needed wonderful-tuning adjustments if required. On the list of standout attributes in the Chamberlain Whisper Drive one/two Hp Belt Drive Garage Door Opener is its whisper-peaceful operation. https://youtu.be/wSkWTAdm-Gg?si=pR5EXdjVuNYjtHN7