The 4630 and 4640 Series operators are designed primarily for manually opening applications that sometimes require an automatic opening. They are backed by a 2-year limited warranty, are UL and cUL listed, meet ANSI/BHMA 156.19, meet the American Disabilities Act (ADA) and ANSI A117.1 requirements for accessibility. The 4630 and 4640 Series are best for multi-door applications and provide easy access for the elderly and people with disabilities. The digital control box provides fast and accurate adjustments and the "No Destruct" drive system resists damage.