We recommend a combination of both optical and ionisation alarms in every home. Features of this Kidde optical alarm include a battery test button, and a hush button to quickly silence false or nuisance alarms. It measures 104mm in diameter, and 40mm deep.
Includes screws for either wall or ceiling installation. BSi Kitemarked to BS 5446 pt. 1, and CE Marked. Manufactured by Kidde and covered by a 5 year manufacturer warranty.