The device covers all 4 windows and operates as soon as you lock the car with the alarm. It only works if there is an alarm, not autonomously. It works on the car's electric windows (not manual) which you have forgotten open and do not have time to reopen the car and close them or simply do not want to search which one is open. The device starts searching the 4 windows ABCD as soon as you lock and closes them automatically accordingly. It is a simple but smart device that relaxes you and helps you close and secure your car without windows forgotten half-open. The device cuts off the lifting power supply as soon as it has reached its sealing limit. The package includes instructions in English, installation diagram, the device – brain, and wiring with the plug for connections. It should always be installed by a specialized technician who will perform the appropriate checks before installing it. It has ISO/TS 16949: 2002 certification.