Smartpass Amplifier and 4G LTE Filter - built into all ANTOP amplified TV antennas - blocks 3G and 4G wireless signals for noise-free digital reception. The AT-415B is typically designed for outdoor installation - It's compact and unobtrusive making it suitable for installation on rooftops, in attics, or even in outdoor spaces. Support both UHF (Ultra High Frequency) and VHF (Very High Frequency) television signals allowing you to receive a wide range of channels. Easy to install this outdoor tv antenna even if you are a 60,70 old man. We have installation video and different language user manual inside.