The HEIMAN Smart Smoke Sensor HS1SA Z-Wave provides accurate detection of smoke and visible particles caused by smouldering fires, alerting you acoustically with an 85 dB alarm and visually with a flashing red LED. It integrates with any Z-Wave gateway for remote alerts to your smartphone when you are away from home, helping to prevent fire and reduce damages. Features: DIN EN14604 compliance, S2 security, 3-year battery life (1x CR123A), Z-Wave Plus wireless connectivity.