WiFi WAN Router 3M Wi-Fi Antenna Extension Cable RP-SMA 3 Meters Long This is RP-SMA (Reverse Polarity SMA) extension cable Plug directly into your Meraki, D-link DWL520, Linksys WMP11, WET11, Netgear MA311, or D-link APs (anything that uses Reverse Polarity SMA) Ideal for extend the cable for installing the antenna to the ideal location Please notice that the SMA in Reverse Polar format (without pin inside) and sometimes call RP-SMA