Siren alarm is an intelligent device that can be controlled remotely by the radio frequency. Siren alarm send messages via Z-Wave network to the Z – Wave main controller. In the ZWave network communications, Siren alarm can be connected to any Z-Wave main controller, Different countries or areas, the radio frequencyof the Z-Wave network is different.In the communication between the Siren alarm and Z-Wave main controller, the siren alarm can both send and receive messages. When press the code button of siren alarm, it will send message to the Z-Wave main controller, the Z Wave main controller can display the on/off status of the siren alarm; when the siren alarm receives messages from theZ-Wave main controller, the siren alarmwill be triggered. The siren alarm is battery powered, small and easily install. When sirenalarm is working, LED light will flash, and there will be alarm sound at the same time. The sound is not lower than 100 decibels.