A large part of the TV spectrum in Australia is being reallocated to mobile phone services (for LTE Technology). This means that future mobile phone services may interfere with your TV reception. You can eliminate this problem by inserting this filter into the antenna input line of your TV. • 'F' type in, F' type out. • No power supply required • * LTE rejection: 25dB @ 750MHz • Pass band: 5-694MHz • Dimensions: 47(L) x 21(Dia.)mm