Chamberlain ® Whisper Drive ® Garage Door Openers are America 's best-selling premium drive systems. These belt drive openers are all equipped with a powerful 1/2 HP motor.Strong and reliable, our belt drive openers are the quietest available Belt is built like steel-belted tire, reinforced with flexible steel cords Motor Vibration Isolation System (MVIS ®) offers super-quiet operation New Quick-Install Rail System installs in 60 seconds, with no tools required Our belt drive openers include our best warranty ‚¬â€œ lifetime motor and 10-year belt
