Constructed from Marine Grade Stainless Steel, this compact horn produces a staggering 105 decibels in the 350Hz to 390Hz range. Suitable for Power Boats, Narrow Boats and Yachts. Mounting Bracket and anti-vibration rubber pad included. Audible range: 370Hz ±20Hz, Sound Intensity: 105dB Voltage: 12V DC Current: 3.5Amps Dimension: 76.2mm x 50.8mm