Plenty of generic rivals sit in this slot; the 4 kg fire safety compact is the one that behaves. At a glance Type: Smoke Alarm Class: A Capacity: 4 kg Mounting: Hallway Hook Price: à§³24.01 (offer à§³22.58) Why it holds up Set up as a smoke alarm-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. Reasonable to buy, easy to live with, boring in exactly the right way.