4G LTE Filter HDTV Band-Pass Filter can remove interference from frequency bands3G/4G outside the TV band. It can improve the TV signal. Passes range 80 to 800MHz, Blocked 800MHz above/80MHz under. Filter removes noise for better picture. It is recommended to be used indoors for TV antennas and TV connection locations. Reduces RF noise, increasing number of ADS-B/Mode S messages. Shielded Cable - less loss, less interference. Can be used for a long time without damage. This is a filter and not an amplifier. It cuts out unwanted frequencies to stop LTE over 800MHz interfering with TV signals