Hapippofa Interlinked Smoke Alarms for Home,10 Year Sensor Life Fire Alarms with Test/Silent Button, Replaceable 9V Battery Powered Smoke Detector,Conforms to EN 14604 Standard,12 PCS

BS EN 14604 Certified & 10‑Year Alarm Unit Lifespan (Not Battery Life): Smoke alarm rigorously tested to UK safety standards for reliable fire detection. Powered by user‑replaceable AA batteries delivering up to 5‑year runtime under typical standby. A low‑battery alert will notify you when cell replacement is required. Simply swap batteries to achieve the smoke alarm’s full 10‑year design lifespan. (Battery runtime varies with usage, alarm activations and ambient temperature; frequent alarms or extreme temperatures may shorten battery life). Provides steady home fire‑safety protection
Wireless Interconnect Technology for Whole-Home Safety: Smoke alarms for home create a complete safety network. When any one alarm detects smoke or fire, it wirelessly triggers all interconnected alarms throughout your home (typically up to 12-24 units), ensuring the alert is heard unmistakably, whether you’re in the loft or the lounge, day or night.
Easy Fit in Minutes, Ideal for Landlords & Home