1,CE ,ROSH certificate 2,easy to install 3,newest design and popular 3,high gain and low noise Features:Model Number: SG-635 18EFrequency Range : 45-860MHzReceiving Range :UHFGain: 12dbOut Impedance: 75ΩNoise Figure:≤1.5dbWe can produce different kinds of antenna as your reference:Certificates: SG-635 18E outdoor antenna