SD2J0AX Standalone Smoke Alarm

10-Year Sealed Battery: Long-life lithium battery powers the device for its full 10-year lifespan.   Accurate and Reliable: Photoelectric sensors sample air 3 times every 10 seconds, ensuring accuracy and reducing false alarms.   Simple Installation: No rewiring needed; easily mounts on any wall or ceiling with the included bracket, screws, and anchors.   Smart Auto-Check: Regular self-testing with clear alerts for low battery and malfunctions.   Flame-Retardant Design: Made with heat-resistant ABS housing for durability and stable operation