2 Pack LOUD Exterior Speaker Horn Alarm System Two-Tone Siren 30 Watt 122 dB (Indoor/Outdoor White) UPG is a leading designer and provider of personalized home and business security, energy conservation management and convenience solutions. Pre-Wired For Easy Installation Ideal for Alarm Systems Two Tone (Long or Yelp) 122 dB High quality rugged design for interior or exterior use Lifetime Limited Warranty