Fire Sentry Smoke Alarm - Micro Profile

(Please ignore the little green Jack's price label! This item is free!) Manufacture date on back: Sep 3, 2021. This is a Fire Sentry i9040 smoke alarm with a micro profile design. It's battery operated and includes a 9V battery, which can be replaced if it has expired. Features include a test button, low battery indicator, and easy installation. Package was unopened, but I had to open it to look at the manufacture date.