Security+® Feature Package 1/2 HP chain drive Equipped with PosiLockTM -stops intruders by securely locking the garage door when it is down IncludesThe Protector System® - projects an invisible light beam across the garage door opening and automatically reverses the door if anything interrupts the beam while door is going down Includes 1 Standard Security+ Remote Control Illuminated door control button Manual release in case of power failure Single light with lens cover 4-1/2 minute automatic light delay 4-year motor warranty