This antenna has a high gain and a narrow radiation angle, so it is suitable for long-distance communication. For short-distance communication, the mitting antenna and the receiving antenna must be aligned. If they deviate from the radiation range, the communication effect cannot be achieved. It is suitable for long-distance image mission remote control of flying drones.<br> Specifications:<br> Frequency bandwidth: 2.3GHz-2.65GHz<br> Polarization mode: circular polarization antenna (left-hand / right-hand)<br> Impedance: 50Q<br> Gain: 13dBi<br> Radiation angle: 60°<br> Maximum wave ratio: (2.4GHz-2.5GHz) Less than 1.2<br> Due to different batches, there may be differences in product appearance and printed text, which will not affect use<br> Specifications: A: Internal thread inner hole (left-handed) / B: Internal thread inner needle (left-handed) / C: Internal thread inner hole (right-handed) / D: Internal thread inner needle (right-handed)<br> Colour: Black<br> Material: PCB<br> Package Contents:<br> 1 x 2.4GHz Directional Antennas<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.