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i bought both sets 2.4 and 5.8. the plastic is printed but seems thick and sturdy i like the construction. im struggling to test them well so i cannot give any figures to how well they work. as the signal is more directional you have to always be pointing at the drone. if you are going to fly over head at altitude and then in front of you at distance you tend to have to move the controller to maintain a stronger signal. the video and control signal at distance can vary from good to bad if you lose track of the drone and point the controller in the wrong direction.
EXCELLENT ANTENNE WORKS VERY GOOD THE SIGNAL IS MORE STABLE AND WITH THE MAVIC MINI IN CITY WITH SIGNAL FREQUENCY IN MANUAL 2.4 GHZ AT DECLARING THE BAND ERA GREEN THEN THEN IN FLIGHT IS DIVENTED AND ARE RIUSCITO TO ARRIVATE TO 1500 METERS, I HAVE PURCHASED 2 SO HO 2 ANTENNE 2.4GHZ AND 2 ANTENNE 5.8GHZ AS IN PHOTO IF NO WITH 1 PURCHASE HAVE 1 ANTENNA 2.4GHZ AND 1 5.8GHZ.