Features: * 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 on * Includes two single-button remote controls and a multi-function control panel What"s In The Box: * Chamberlain PD212D Power Drive 1/2 HP Chain Drive Garage Door Opener