Kidde – Battery Operated Smoke Alarm (i9060) – Hush Feature Suitable For Kitchen
This item is due and sealed. I do not see any date on it for when it was manufactured.
Siterwell Hard Wired Smoke Detector Fire Alarm Model GS509A – 6 Pack
If the smoke alarm is in normal working condition, the green LED light is always on and the red LED light flashes every 40 seconds.