Andyssey Smoke Detector, Smoke Alarm with 10 Year Life Time, Photoelectric Fire Alarm with Battery with Low Battery Failure Warning Button, Fire Alarm Smoke Detector UL Listed, GS526A 4 Packs

【Test/Silence Button】 Smoke detector with test/silence button, you can manually turn off the alarm sound at any time when there is no alarm.To test weekly, press the test button on the lid and hold it for at least 5 seconds. If the electronic circuit, horn, and battery are working properly, this will sound an alarm.
【10 Years Battery Life】10 years smoke detector , sealed installation of 3V 10 year lithium battery, longer service life.You won’t worry about replacing the battery any more. And smoke alarm can save energy and protect environment.
【Certified Safe and Reliable】The fire alarms smoke detectors have been strictly tested before leaving the factory and passed UL safety certification,its quality is guaranteed. The smoke alarm don’t contain any radioactive material and won’t cause harm to human’s body.