Installer friendly easy to mount Sealed reed tamper switches prevent crooks from disabling the siren Blends with any mounting surface Essential Info A rugged quality siren mounted in an attractive tamper resistant no-rust enclosure. Ideal for exposed outdoor installations. Simply apply 12VDC to activate siren. Built-in siren driver. Works with most security systems. Also available in a Speaker version. Manuals/Software Onwers Manual What's Included Stainless Steel Outdoor Siren - ELK-150-RT More Info Expand the power of your security system with an outdoor siren mounted in weatherproof, rust-resistant steel enclosure. The siren is a great way to maximize the power of your security system, particularly if you live in a remote area. It contains a siren-driver circuit that will produces a loud, 122dB tone when supplied with 12VDC. Units are built into polished stainless steel enclosures that naturally reflect the mounting surface and easily blend with any residential or commercial building. It features two sealed reed tamper switches, one on the Back plate and one on the Front Cover. The switches are normally closed and pre-wired in series. The siren can produce two distinct sounds from a single input trigger. Check under the Accessories & Related Products section below to listen to a sample.