Black + Decker Mains Smoke Alarm 9V Battery Back Up. Powered Optical Detector. Interlink Alarms for full Home Protection. FAST FIX Easy Installation Base, Test Button, White

FAST & RELIABLE SMOKE DETECTION: Features a high-quality optical sensor that quickly detects slow, smouldering fires by sensing smoke entering the alarm chamber. Ideal for living areas, bedrooms, and hallways, avoid installation in kitchens or near bathrooms. MAINS POWERED WITH 10-YEAR LIFESPAN: Designed for long-term reliability with mains power and a 9V alkaline battery backup for power outages. Provides a 10-year operational life with minimal maintenance. EASY TESTING: Large, accessible test button allows quick and simple checks to ensure the alarm is functioning correctly. EASY TESTING & QUICK INSTALLATION: Large, accessible test button allows simple functionality checks. Comes with a fast-fix baseplate for quick and secure mounting, no complicated wiring required. MINIMAL FALSE ALARMS & TRUSTED QUALITY: Engineered to reduce false alarms from cooking fumes or steam. Includes alarm memory that flashes for 72 hours after activation. Kitemark certified by the British Standards Institute (BSI) to BS EN 14604:2005+AC:2008. INTERCONNECTABLE: CAN BE OPERATED EITHER AS A STANDALONE ALARM, OR CONNECTED WITH UP TO 20 ALARMS, MEANING WHEN ONE ALARM TRIGGERS ALL CONNECTED ALARMS WILL TRIGGER.