Vibratone Horn 24VAC - Coded or sustained tones. Available in 12, 24, 120 and 240VAC. Produces 100 dBa at 10 feet (110 dBa at 1m). Surface or flush mounting options. Type 4X when installed with Panel Mount Gasket Kit or Weatherproof Backbox (Model WB), Type 4X and Type 12 when installed with Surface Mount Trim Ring (Model TR). UL and cUL Listed, CSA Certified, and FM Approved.