Important Facts to Consider: Electro-Mechanical Warning Siren. No speakers or amplifiers here, just real, honest, big-time, worry free sound. 100% Maintenance Free Siren: Just take care of the batteries, and that's it !!! 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. Proven, this siren has been deployed in cities around the world, and is the best selling single tone siren we have. 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.** Sentry's most popular mid-sized siren is a proven performer. Staged horn projectors help organize sound for even distribution over a large radius. Rated at 115 dB at 100 feet, the Model 10V is an OMNI-DIRECTIONAL siren which produces continuous 360º coverage, making it a superior alternative to a rotating or directional beam siren. The perfect siren for small communities, the 10V is available in either single or three phase power and is a single tone siren, producing 460 cycles per second. All exposed siren components are of metal 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 10V shall be 78", maximum height of 56", and maximum mounting base of 19" square. Shipping weight of the siren alone is 325 lbs.