Enhance your home's safety with this set of four Aico Ei3016 Mains Powered Optical Smoke Alarms, model 2035. Designed with both battery backup and hardwired power options, these alarms provide a reliable early warning in case of a fire. Their sleek white finish ensures they blend seamlessly into any home decor. Each alarm measures 15.5 cm in width and 6.2 cm in depth, making them compact and easy to instal. The optical sensors are engineered to detect the presence of smoke, ensuring that you are alerted to potential hazards quickly. Trust in Aico's expertise to keep your living space safe and secure.