1. The BNC connector is made of environmentally friendly copper material. 2. Suitable for high-frequency signal transmission 3. The general SMA/TNC connector models can be divided into the following four types of names: the internal needle of the internal screw is called the male SMA-J; the internal hole of the internal screw is called the reverse polarity male RP-SMA-J; the internal screw of the external screw is called the male connector RP-SMA-J; The hole is called the female head SMA-K; the outer screw and the inner needle are called the reverse pole female head RP-SMA-K. 4. The interfaces of commonly used 2.4G WIFI routers and wireless network cards are generally external screws and internal pins RP-SMA 5. All-copper converter from N female to SMA male, SMA male to BNC female Model: SMA to BNC-JKSMA male to BNC female White insulation: polytetrafluoroethylene PTFE (high temperature resistance) Impedance: 50 ohms Frequency: 0-6GHZ Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:As Shown Material:copper Package Contents: 4 x All-copper converter N female to SMA male 4 x SMA male to BNC female 2 x SA6 spectrum analyzer SMA test probe 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.