United States bought this(The B503 is an ultra-quiet and strong steel-reinforced belt drive garage door opener thats easy to install and operate. Perfect for attached garages its precision engineered for years of reliability and quiet smooth performance you can sleep through. Designed and engineered for safety and security it features enhanced Triband frequency technology for superior range and performance Security+2. 0code encryption Posi-lock protection against forced entry dual-function wall control and more. Unit accepts two 100 wmax non-halogen or 26 wCFL light bulbs not included. Designed specifically for 7 ft. garage doors – extension kits required for 8 ft. and 10 ft. doors. Exclusive Triband technology boosts remote range up to 1500 feet for a quicker entrance and exit Trusted Safety Security – Unmatched Security+2. 5″ H.
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