CLARITY: 15 WATT HORN W/ 25/ 70/100 Vlt Transformer - Grey Valcom's 15 Watt SX Series Paging Horns reduce install and adjustment time. Features: Clarity Omni-Lock System allows the horn to be positioned at any angle required Pop-on mounting of the horn to the base Weather-resistant for both outdoor and indoor paging applications ABS with ultra-violet inhibitors and stainless-steel hardware Shatter-resistant mounting base Mounts to eight of the most popular electrical boxes Nine position selector switch Operates on 25, 70 and 100 volt speaker lines