Putogesafe Smoke Detector Battery Operated, 10-Year Smoke Alarm with Photoelectric Sensor, Fire Alarms Smoke Detectors with Test Button and Low Battery Warning, Fire Safety for Home, ZA208, 6 Pack

【10-Years Product Life】This smoke detectors equipped with built-in 3V lithium battery for continuous power supply, which can reduces the trouble of frequent battery replacement, and provides uninterrupted 24/7 protection for your family
【Advanced Photoelectric Technology】This smoke detector battery operated adopts industry leading photoelectric sensor technology, which is optimized to detect slow burning fire quickly and accurately, provides the earliest possible warning of fire to helps your family keep far away from fire dangerous. (Alarm Loud>85dB)
【Self-Check Function】This smoke alarms equipped with a big test/silence button, in case of non-emergency smoke (e.g those caused by cooking or steam), you can touch it with a stick for test weekly or turn off the annoying false alarm sound, besides, the sound of test mode is low, which can avoid to frightened your baby with lound sound