FIRST ALERT CO400FF Battery Powered Carbon Monoxide Alarm, Pack of 1, White & SA303CN3 Battery Powered Smoke Alarm with Silence Button, 1 pack

• Keep your family safe with this easy to use, battery operated carbon monoxide alarm. Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.The alarm sequence should last 5-6 seconds. If it does not alarm, make sure fresh batteries are correctly installed, and test it again. If the unit still does not alarm, replace it immediately A loud 85 decibel alarm sounds when CO levels reach dangerous levels To ensure complete protection make sure to place one on each level of your home and in each bedroom Help keep your family safe with this battery powered smoke alarm featuring an ionization sensor for smoke detection. a loud 85 decibel alarm sounds when smoke levels are elevated Ionization sensor is effective in recognizing smoke from flaming fires such as paper and grease fires Battery operated alarm unit provides continuous monitoring even if there's a power failure. Plus, it's easy to install Tamper resistant alarm also features a single test/silence button, side battery door, and missing battery guard, Manufacturer: First Alert