Interlinkable Mains Powered Optical Smoke Alarm Green Lighting GL-P101A Photoelectric Technology - Faster acting than radioactive ionization alarms Dust Compensation - Sensor automatically adjusts to gradual dust contamination Interlinkable - Connectable with up to 40 other units Fast Fix Backplate - Allows for quick and easy installation 10 Year Product Life - With user replaceable 9V back up battery The Green Lighting GL-P101A smoke alarm uses advanced photoelectric technology for faster, reliable detection. Its dust compensation sensor ensures consistent performance by adjusting to dust buildup. Easily interlink up to 40 units for comprehensive home safety. Featuring a quick-install backplate and a 10-year product life with a user-replaceable 9V backup battery, this alarm delivers peace of mind with a loud >85dB alert and convenient test and silence buttons. Certified to BS EN 14604:2005, it’s a smart, durable choice for protecting your home. . Voltage 230V Sensing Technology Photoelectric Back-Up Battery 1x 9V Alarm Sound Output >85dB at 3m Silence Time Approx. 8 minutes Dimensions Ø140 x 44.6mm Approvals BS EN 14604:2005