... locking systerm,car central door locking,car door lock,auto lock,central locking,auto central lockingSpecification:Ultrasonic welded and excellent waterproof Available ... or 4 door lower case and uppercase Outside full 360 rotation available Optional choices of single control and double control working ... .2s Longevity:100,000 times Working temperature:-30--65 degree auto central door locking (FD-CL04)