The V21 High Gain UHF / VHF Antenna is ideal for locations within 15 to 65 miles of the transmitters. It features 21 elements and a powerful 12.9 dB gain for receiving all of the major VHF (channels 2 to 13) and UHF signals (channel 14 to 69). It is a uni-directional antenna so it must be pointed towards the transmitters to achieve optimum performance.