The Genie Chain Drive 500 garage door opener offers the best in traditional chain drive garage door operation. Dependable and durable; the Chain Drive is an affordable option with superior design and performance. You can count on many years of worry-free service with almost no maintenance needed, The strong Genie DC motor suitable for residential garage doors up to 7 ft high and 350 lb in weight. You can expect smoother door travel and easier installation than most garage door openers at this price.