Previously marketed as the Kidde 4985, this alarm is simple to install with the included screws, wall plugs and sticky pads. Mount on ceiling or wall. Battery test button to ensure battery is charged, and hush button to quickly silence nuisance or false alarms.
The 4985 comes with a 6 year warranty, and is interconnectable with up to 23 other compatible devices. Measures 127mm in diameter, and 39mm deep. Manufactured by Kidde Firex.