Important Facts to Consider: Electro-Mechanical Warning Siren. No speakers or amplifiers here, just real, honest, big-time, worry free sound. 100% Maintenance Free. Not just a part of the siren, the whole system !! NON-ROTATING. Forget about the worries of rotating sirens, this unit only has two moving parts !! Mechanically produced sound - stronger and further reaching than electronically produced sound. Compatibility, this siren will integrate seamlessly with 99% of existing siren systems. Lifetime Tech Support is included with every siren. No matter how old your siren is, we will help you through any problems. FIVE YEAR WARRANTY so you can rest assured your siren will be functional at all times.** Designed for small towns or Volunteer Fire Departments, the 3V8-H combines large siren functions with cost effectiveness. Utilizing the same effective design and construction as its brother the 3V8, the 3V8-H uses projectors to distribute and organize sound. Rated at 109 dB at 100 feet, the Model 3V8-H is an OMNI-DIRECTIONAL siren which produces continuous 360º coverage. The 3V8-H is available in either single or three phase power. The Model 3V8-H is a single tone siren, producing 460 cycles per second. All exposed siren components are of zinc plated steel construction, which are "Powder Coated" for the most durable finish available. The fan and housing are made of non-corrosive cast aluminum. Maximum diameter of the Model 3V8-H shall be 34", maximum height of 34", and maximum mounting base of 19" square. Shipping weight of the siren alone is 250 lbs.