Frequency bandwidth: 2.3GHz-2.65GHz Polarization mode: circularly polarized antenna (Left-hand - internal thread internal needle) Impedance: 50 Gain: 13dBi Radiation angle: 50 Maximum wave ratio: (2.4GHz-2.5GHz) Less than 1.2 Maximum withstand power: 50W This antenna has a narrow radiation angle due to its high gain, so it is suitable for long-distance communication. For short-distance communication, the mitting antenna and the receiving antenna must be aligned. Deviating from the radiation range not achieve the communication effect. Suitable for long-distance -country image mission remote control. Colour: black Material:plastic style:C right-handed (internal thread inner hole) Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 x Directional Spiral Antenna Only the above package content, other products are not included. 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.