Strong And Reliable Chain Drive. 5-Piece Rail System Provides Faster, Easier Installation. Security Plus Anti-Burglary Coding Sends A Brand New Code, 1 Of Over 100-Billion Every Time Remote Is Used. Protector System Electronic-Eye Safety Device Automatically Reverses Garage Door If Anything Obstructs It When Going Down. Breaking The Protector System Beam Automatically Turns Garage Door Opener Lights To Flash For 5 Seconds. Up To 4-1/2 Minute Time Delay. One Light Lenses. Manual Release Handle In Case Of Power Failure. Includes: Garage Door Opener, 2 Single Security Plus Remote Controls, Multi-Function Control Panel And Safety Sensors. 100 Watts Of Lighting.