BLACK+DECKER CONNECTED Smoke Alarm. 10 Year Lithium Battery Alarm for Home. Wireless Interlink up to 20 Alarms. Easy Install Optical Detector Fire With Test/Silence Button. White.

WIRELESSLY INTERLINKED FOR FULL-HOME PROTECTION: Connect up to 20 BLACK+DECKER alarms using advanced RF10-PRO radio frequency technology. When one alarm triggers, all connected devices, including smoke, heat, and carbon monoxide alarms will sound together for faster, coordinated alerts across your home. 10 YEAR BATTERY INCLUDED: Enjoy a decade of reliable safety, no battery changes needed for the entire lifespan of your Black+Decker smoke alarm. The sealed, tamper proof 10 year lithium battery lasts the life of the alarm. The alarm will indicate when it needs replacing RELIABLE SMOKE DETECTION: Features a high-performance optical sensor that quickly detects slow, smouldering fires by sensing smoke particles in the air. Ideal for living areas, bedrooms, and hallways, avoid installation in kitchens or near bathrooms. EASY SET UP GUIDE: Insert the alarm onto the activation back base plate and twist the alarm firmly clockwise until you hear a ’CLICK’ then press and HOLD the test button for at least 3 SECONDS until you hear the alarm sound. If the alarm doesn’t sound after 3 seconds, twist the alarm firmly clockwise to try again. QUICK INSTALLATION & TRUSTED QUALITY: No wiring required, just mount using the included screws and twist the alarm into place. Built with an alarm memory indicator that flashes for 72 hours after activation. Certified and Kitemark approved by the British Standards Institute (BSI) to BS EN 14604:2005+AC:2008.