The INF-WES is a wireless siren designed for use with the infinite wireless control panel (firmware versions 2.14 and above). In the event of an alarm the control panel activates the siren and strobe. The siren is sounded until the end of the siren cutoff programmed at the control panel. After the siren cutoff has expired, the strobe continues to flash until the system is disarmed.
Features

• 108db high frequency siren
• Audible "system set" function
• High visibility strobe
• Front and rear tampered
• 12vdc only operation
• NB Only for use with infinite panel software version 2.14 and above
• This bell box requires connecting to a mains power supply

More details online:

• Easy Installation and Programming guide to the Infinite Prime Wireless alarm - download the pdf file or read the manual online.
• You can expand this system, to have more functions and to be more suitable for other needs(detecting smoke, medical panic button for an older person). You can also connect your phone system to communicate whether an intruder came in or your elderly relative is in need of help.
• Monitoring the system - either personal or professional monitoring, or adding the home automation option;
• Read more about the Wireless External Siren - Infinite Prime on the Infinite Prime Wireless Alarms Presentation website