Two-way, fully wireless outdoor sounder overcomes these challenges through easy, cabling-free installation and optional extended time between battery changes, for long-lasting operability. In addition, two-way and fully supervised communication with the control panel assures highly reliable operation. This affordable sounder’s sleek design ensures it is clearly visible, alerting and deterring potential intruders, while maintaining the clean look of any building. In the event of an alarm, the siren sounds loudly and the strobe light is activated, ensuring the alarm is noticed.