Kidde Smoke Alarm Mains Optical Hard Wired Firex KF20 Interlink 230V, Fast P & P
The KF20 includes a 9V alkaline battery backup, while the KF20R features a self-charging long-life lithium backup. Up to 24 units can be connected for comprehensive coverage. 🔥Kidde Firex KF20 / KF20R Mains-Powered Optical Smoke Alarm.