we are specialized in manufacturing Car Alarm System,car alarm, ... alarm security,auto alarm system. we are specialized in manufacturing Car Alarm System,car alarm,auto alarm, ... .Electrical/Pneumatic central locking optional 10Central locking control module built-in11Silent Arm, Arming remindingTechnology parameterA. Main EngineWorking voltage12V+ ... -433.92MHZ Car Alarm System With Central Lock Built-in