The reliable ½ horsepower Commander II screw drive garage door opener is encased in a wear-resistant channel that eliminates metal-to-metal contact, so never needs lubrication. Commander II openers are also equipped with a Motor Vibration Isolation System, a revolutionary "floating motor" design that eliminates powerhead vibration, resulting in smooth, quiet performance. Safety and security features include the PosiLock™ Security System, adjustable light delay, and Protector System® photo eyes. Commander II openers come standard with a Premium Multi-Function Control Panel and Safety Signal™ transmitters. Commander II openers feature a lifetime motor warranty.