Ready to install so users can start watching TV, this Digital Amplified Outdoor HDTV Antenna comes with pole, power, amplifier, cable, and four-element antenna. Covering VHF and UHF channel range, the antenna has a tough 18.5-inch weather-resistant iron mounting pole. The gain of 30 +/- 5dB pulls in distant signals up to 150 miles. Its front to back ratio of 15-20dB reduces unwanted signals allowing a precise aim.