We made a very conscientious decision not to publish specifications because we know that 95% of consumers buying our antennas would not understand the technical details. For those that do care about it, you can contact our support team for more information. Our goal is to offer products that work, are easy to use, and are not confusing the consumer with "what is gain?", what is VSWR?", "what is UHF and VHF?" and other such specs that speak to the technical data.