Super Power Supply&reg; 1 x 8" inch / 20cm RP-SMA Female to MS-156 Male Pigtail MCC Coaxial RF MS156 Cable RG178 for D-Link DAP-1522 Netgear WNR3500L USA 1 x RP-SMA Male to MS156 Cable This kit allows you to add high gain external antennas to your wireless router that does not normally support removable antennas. Certain routers and other WiFi devices have connectors compatible with this kit which allow the use of high gain antennas. In most cases just open up the router, locate the connectors, connect the leads, and drill out holes in the router's enclosure for the external connector and mount.