... .Jam-prevention,Dust-tight,Waterproof 4.pull/push force:7.5KG Remote Car Central Door Locking System CL- ... track design, work stably and smoothly, jam-prevention 4.Parting line is sealed by ultrasonic welding completely, ... easy to install, flexibly to install7.Compatible with car alarm system and remote controller8.Universal features, suitable ... can be provided central locking system 4 door car alarm