If there is any resistance against gate descending,electric motor will immediately stops gate descending and turns gate upward in order to prevent automobile damage or human injury. Light is on automatically as gate opens.The light will be off in 4 minutes. You will never experience parking trouble in the dark night with light. International advanced codiing technology is adopted in the remote controller of motor.Coding capacity exceeds 100,000,000.Better safety and burglar protection. Special and high quality steel board and polyester foam with excellent density.Precision processing by international equipments.Strict inspection is carried on for each gate for quality control