Sensitive & Intelligent: The state-of-the-art photoelectric sensor, combined with an advanced intelligent chipset, this smoke alarm for home can accurately detects dangerous smoke levels in seconds with fewer false alarms 10-Year Battery Life: The low power consumption enables an incredible product life of up to 10 years with the built-in lithium battery; provides reliable uninterrupted 24/7 protection so you can sleep safely Reliable Auto-Check: The fire alarm monitors itself constantly and timely informs you of faults or a low battery for secure use Superior Construction: Made of fire-retardant ABS plastic material; the long-lived smoke detector horn alerts you with a loud 85-decibel alarm when smoke has been detected High Quality: This premium smoke alarm conforms to EN 14604 standard, Weight: 0.39242282636 Pounds, Manufacturer: X-Sense