WALMART: Kidde Fire Sentry Micro Profile 3 Year Smoke Alarm, 9 Volt Battery, SALE! $3.84 (Reg $6.66)
Keep your home and family safe and secure with this Kidde Fire Sentry Smoke Alarm. It features a low profile and discreet design with state of the art protection technology from Fire Sentry, and it is powered by a 9V battery that keeps working, even when power to your home is interrupted. This white smoke alarm has a low-battery indicator so that you know when it’s time to replace its batteries before it ceases to function. It also includes easy-to-follow installation instructions, and a 3-year limited warranty.