DOUBLE-LAYER SHIELDING & FLEXIBLE- Copper braid shielded + Aluminum mylar double shielded coax extension cable supports better signal retention than other single-layer shielding RG58 cable or RG316 / RG174 cable,it is for longer cable runs and higher frequency use,and also flexible enough for your applications. RG58 COAX CABLE- Connector 1: SMA male plug; Connector 2: SMA Female jackImpendence: 50 OhmLength: 16.4ft SMA ADAPTER KIT- Includes 5pcs SMA connectors to convert your cables or devices between Male and Female, SMA and Reverse Polarity SMA.Meet SMA/RP-SMA cable requirements for different applications in just one kit.(The difference between SMA and Reverse Polarity SMA is described in detail below) APPLICATION- SMA kit compatible with All SMA-Based equipment,and the SMA connector kit enables a wider applications,including Modems,Router,PCI Card,WiFi Signal Booster Repeater,Access Point,Wireless AP Hotspot,Car Radio,Wireless LAN/Card,RTL-SDR USB Dongle, ADS-B Rec