This is a universal 4-door locking kit with key input system, and it will allow you to lock and unlock your car doors using a keychain from a distance. This central locking system is delivered with 4 actuators, 2 remote controls, 1 door locking module, a bundle of cables and a full set of accessories for installation. With this powerful kit, you can transform manual door locks into automatic door locks. In addition, it can improve your original control locking system and make your car more practical and safer. assembly: for most cars or cars, for the installation of 4 doors specification : Distance: approximately 30 - 80 meters Operating voltage: 12V 3V Trank force: 32N 4n Stretching distance: 18mm 1mm Working temperature: - 30 ------ + 80 Module circuit current: 81MA maximum Current indicator: 15MA Work frequency: 433.92mhz Life: 10.0000 times The package includes: 1 x Control box 2 x remote controls 4 x Door locking actuator Mounting accessories Characteristics: Log and unlock your car to Distance Delivered with 4 door locking actuators Delivered with 2 remote controls and universal installation accessories for all cars Change manual car door locks to automatic locks Note: 1. The cable beam must avoid the high temperature and high voltage position. 2. Do not put the main unit of the system and the remote control in the water, do not get wet or do not expose yourself to sunlight at high temperature. If the remote control distance becomes shorter or if the LED light becomes low, please change the new battery of the remote control. 3. Before installing the central locking system, please clear the door structure that will be installed on, and make sure that the installation location, which will not affect the movement of the window. 4. After installing the lock, roll the window from top to bottom several times to make sure that there is no scratches. Then put the door panel in place. 5. This product has no alarm function or a flashing function of the parking lights.