Reddit reviews First Alert Battery Powered Smoke Alarm with Silence Button, SA303CN3

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 elevatedIonization sensor is effective in recognizing smoke from flaming fires such as paper and grease firesBattery operated alarm unit provides continuous monitoring even if there's a power failure; Plus, it's easy to installTamper resistant alarm also features a single test/silence button, side battery door, and missing battery guardTo ensure complete protection make sure to place one on each level of your home and in each bedroomIt can ship within the US except New YorkFirst Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)