Chamberlain brings quality, value and convenience together in the garage access solution that does more than just open and close your garage door. Chamberlain products are designed to solve problems. With innovative, high-tech features like built-in Smartphone Control making it easy to personalize your home and garage access setup and Battery Backup so you're never locked out of your home. You get security and reliability, with family access flexibility. The C870 features an extra strong chain drive plus smart technology and life-managing features. With the Chamberlain myQ App, you can get real-time alerts, open, close, and know the status of your garage door and more—from anywhere. Powered by Chamberlain’s lift power system™, the C870 delivers the highest lifting capacity in the category. And with battery backup, you’ll have access to your garage even if the power is out.