Designed for homeowners safety and convenience, the Chamberlain B-373 Smart Garage Opener offers a wealth of features that offer homeowners increased security and peace of mind. Complete connectivity: Close your garage door from anywhere, open it for anyone, and get alerts with the myQ App. Powered by Chamberlains MED Lift Power System, the B-373 delivers lifting force equivalent to 1/2 HP, the highest lifting capacity compared to the 1/2 power class for effortless lifting and reliable performance you can count on. Access your garage door even during power outages. The B373 is California SB-969 compliant. Ultra-quiet and strong belt drive, steel-reinforced belt drive is constructed with high-grade materials for years of worry-free, long lasting, ultra-quiet operation perfect for attached garages. Unmatched Security+2.0 100 Billion code encryption protects against hacking, and Posilock anti-theft protection assures that once the door closes, it stays locked. Our online installation videos, pre-programmed remotes, snap-lock rail system and tech support ensure installation goes smoothly. Designed specifically for 7 ft. garage doors - extension kits required for 8 ft. (8808CB-P, SKU 113379) and 10 ft. (8810CB-P, SKU 113387) doors. Five year (belt) and six-year (motor) warranties. Box includes: Garage door opener, garage door opener rail, ultra-quiet and strong belt, 3-button remote, safety sensors, mounting hardware, door bell wall control and instruction manual. The largest and most dependable garage door opener manufacturer in North America.