ERS26R. This ERA Replica External Siren is ideal for giving extra peace of mind when it comes to home security. The battery powered flashing LED light and brand marking deters would-be intruders, which makes it ideal for installing in secondary locations, such as the rear of a house or outbuildings. It is easy to install and comes supplied with fixings and batteries, as well as a 2 year guarantee.. LED flashing light to deter would-be intruders. Powered by batteries to offer the same visual deterrent as that of a 'Live' Siren. Compatible with all ERA Wireless Alarm Systems. Easy to Install