Safeguard your assets with this AICO EI141RC Mains 9-Volt Battery Backup Ionisation Fire Smoke Alarm. Alerting you to danger in seconds, this uses 230/240V AC mains power but also has backup in the form of a 9V alkaline battery, so your early warning system is always available. It can be connected to other alarms by radio wireless bases or cable, for greater protection.