The RRURF RF Relay Unit is a versatile, stand-alone device designed to enhance the functionality of your smoke alarm system. Powered by a 240Vac mains supply, it features a 10-year 3V lithium battery backup for reliable operation of the RF receiver. Simply position the unit within RF range of your smoke alarm or place it next to an auxiliary device. It supports alarm and low battery signal notifications via RF or hard-wired SDI connections. Compatible with both Red Original and Red Professional Series smoke alarms, it seamlessly integrates with any interconnectable 240Vac or 10-year lithium battery-powered red smoke alarms. The unit also offers convenient conduit and duct entries for flexible installation.