Since the re-stacking of Digital TV transmissions has already begun, pretty soon 4G/LTE mobile phone signals will start being transmitted on the old UHF TV channels 52-69. Of course, this means that UHF antennas will be picking up those signals, and interfering with Digital TV reception. When this filter is plugged into the back of a digital TV receiver it will block unwanted signals from 4G/LTE mobile transmitters giving you clear uninterrupted TV reception. Features: - In-line coax connection - Waterproof design - Insertion loss: 3dB - LTE band rejection: 720-1000MHz, 40dB Frequency : 5Hz Packaged Volume : 0.52l Packaged Weight : 0.08kg Packaged Length : 12.5cm Packaged Width : 12cm Packaged Height : 3.5cm