RFaha 4pcs N Type Male/Female to UHF PL-259 SO-239 M/F RF Coaxial Adapter Connector Kit(F36-4) bee M4 Right Hand Threaded Rod

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it need to connect to the DVR to work

RFaha 4pcs N Type Male/Female to UHF PL-259 SO-239 M/F RF Coaxial Adapter Connector Kit(F36-4) bee M4 Right Hand Threaded RodRFaha 4pcs N Type Male Female to UHF PL 259 SO 239 M F RF Coaxial Adapter Connector Kit(F36 4) Pure copper with much better Frequence Response Great for interphone, communication connecting user Connector Material: Pure Copper, Great connectivity Surface treatment: Nickel plated Impedance: 50 ohm Quantity: 1pc for each type Applications: Antennas, Wireless LAN Devices, Coaxial cable, Wi Fi Radios External Antenna, ect. Please confirm the connector