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Chamberlain is the world's largest manufacturer of garage door openers and delivers a quality product which you can dependon. No other manufacturer builds garage door openers like Chamberlain. For years of trouble free performance, every model undergoes extensive computer testing before it leaves our factory When you demand the best, LiftMaster TM Garage Door Openers give you everything you want and more including the very latest safety security and convenience features. Chamberlain is an ISO9001 certified manufacturer that designs and develops products to meet the latest EN and IEC product standards. As a result you can be confident that you are buying the best garage door opener on the market.