For a electrical & lighting listing this is the one we would keep; the smoke detector detectors & alarms just works. At a glance Type: Smoke Detector Power: Hardwired Sensor: Electrochemical Compliance: BS 50291 Price: à§³18.19 (offer à§³15.78) The part most missed Set up as a smoke detector-class unit, it does the job without asking you to improvise. In practice First use: no break-in ritual required beyond a quick wipe and a glance at the label. Care: a rinse and dry cycle in the usual rhythm keeps it looking fresh. Daily duty: handles the regular routine without constant babysitting. Order it, use it for a week, and it becomes furniture rather than a purchase.