Product description Coaxial Cable: 3.6M length Connector Type:F - head with TV adapter V.S.W.R.:<=1.5,Max:1 Impedance:75Ohm Gain:25 dBi(with amplifier) Working Frequency: 174240MHz,470862MHz Product sizeMM2101200.8 Radome Color Black Operation Temperature : -45 ~ 85 Storage Temperature : -45 ~ 85 Package content: 1*digital TV antenna 1.Full HD picture quality: This indoor HDTV antenna features a powerful signal amplifier design that integrates the latest generation of smart and crystal filters. You get a clearer picture, lower noise levels and more free TV channels. 2.Stronger signals: the reception of this HDTV antenna has been optimised to the most sensible condition and captures signals with a range of 40 up to 120 miles, even if you are far from the transmitting mast, please do not worry. You can adjust the amplifier mode to different areas. 3.Easy to use: this antenna is quick and easy to install. You can do this in three easy steps: unfold the antenna, connect it and scan the channel. If you receive only a few channels or get bad results, try moving and scanning the HDTV antenna. 4.Free 4K HD channels: All local news, weather, comedy, kids and sports programs can be viewed online and are compatible with hundreds of digital channels. 5.Ultra-thin design: the thin paper design allows you to easily mount the digital TV antenna on a window (highly recommended) or on a higher wall or a higher table. Note: Do not place the antenna in the basement or at a low point where the radio signal is poor.