This siren draws less current than many competitive units and features the ability to produce two distinct sounds from a single input trigger. The ComboTrigger™ option allows controls which have a single alarm output and pulsing option to activate both the burglar and fire alarm sounds. The MilliMiser™ option allows the already low current draw of the ELK-45 to be reduced even lower. This is ideal for controls with limited alarm output power. The ELK-45’s removable "U” shaped mounting bracket ma