Disconnect Power: Just before working on your garage door opener, disconnect the ability at the breaker or unplug the device to avoid accidental operation and cut down the chance of damage or electrical shock. Among the standout features from the Chamberlain Whisper Drive 1/2 Hp Belt Drive Garage Door Opener https://youtu.be/wSkWTAdm-Gg?si=pR5EXdjVuNYjtHN7