The antenna is with great Warscheinlichkeit a copy of the famous Nagoya antenna. Nevertheless well verarbeitet.Ich have not the possibility that the antenna resonance to measure the amateur radio bands. but it works pretty well. To 70 cm to better than 2 meters, but this was to be expected in length. My replaced an antenna of the Baofeng Baofeng UV 82 L. The Baofeng antenna sucks and not really usable. The Nagoya? is recommended in any case for China cheap devices. The 3 stars are on the sale of a copy to be understood as a reaction than Orginial.