Kidde's 223/9hi optical mains smoke alarm with battery backup is one of the most popular 230v alarms in the UK. Interconnectable to up to 23 other Kidde mains alarms and round for easy lining up, installation of this optical (also know as photoelectric) smoke alarm could not be easier. Fully conforming to BS5839-pt6 Grade D, this alarm has a 6-year warranty. A hush and test button are standard and the battery is included.
Optical alarms are suitable for smouldering fires and are to be used in hallways, bedrooms, and offices - a house should have a combination of optical and ionisation
Do not use in or near to a kitchen or shower room
Fixing requires two little screws and wallplugs (included) to screw to ceiling or use sticky pads
Note If you are using mini-trunking, the Kidde SMK23 ceiling pattress will be needed | 
