When you buy the siren detectors & alarms essential, what you are really buying is predictability. At a glance Type: Siren Power: Mains Sensor: Semiconductor Compliance: EN 54 Price: à§³26.63 What actually matters Set up as a siren-class unit, it does the job without asking you to improvise. In practice Care: a rinse and dry cycle in the usual rhythm keeps it looking fresh. Storage: stows neatly, taking no more room than a loaf tin when out of service. Daily duty: handles the regular routine without constant babysitting. Order it, use it for a week, and it becomes furniture rather than a purchase.