Description: The ELK-100 Siren Driver is a great choice for residential and commercial security installations. It draws less current than most siren drivers, and offers two volume levels (example: one indoor, the other outdoor) simultaneously. The exclusive MilliMiser option allows further reduction of current draw for controls that have limited alarm or auxiliary output power. The ELK-100 has two inputs, Yelp & Steady. The Steady sound overrides the Yelp. The Yelp input has our unique ComboTrigger feature, especially designed for controls that have a single alarm output with a pulsing option for fire or burglary. When pulsed, this channel produces a distinctive third sound pattern. Features: Two Volume Levels SimultaneouslyDraws Less Current Than Most SirensMilliMiser Lowers Current DrawEconomical - Drives Multiple SpeakersComboTrigger For Single OutputsPre-Wired for easy InstallationLifetime Limited Warranty Specifications: 6 to 14 Volts DC1.2 Amps, (700 mA on MilliMiser setting), with one 8 ohm speaker120 db @ 1 meter, 14 vdc, with one 8 ohm speaker4 Ohms max.2.75" X 3.6" (70mm X 91mm) Notice/Warning: Specifications Brochure Installation Manual Owner's Manual